diff --git a/.gitignore b/.gitignore
index 2cd3f63..6ffc9c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -193,3 +193,8 @@ cython_debug/
 #  refer to https://docs.cursor.com/context/ignore-files
 .cursorignore
 .cursorindexingignore
+
+*.txt
+/texts
+*.json
+*.pt
\ No newline at end of file
diff --git a/build_tokenizer.py b/build_tokenizer.py
new file mode 100644
index 0000000..1cb5545
--- /dev/null
+++ b/build_tokenizer.py
@@ -0,0 +1,21 @@
+from collections import Counter
+import json
+
+# Read corpus
+with open('corpus.txt', 'r', encoding='utf-8') as f:
+    text = f.read().lower()  # Normalize to lowercase
+    words = text.split()
+
+# Build vocabulary
+vocab_size = 10000
+word_counts = Counter(words).most_common(vocab_size - 4)  # Reserve 4 for special tokens
+vocab = {word: idx for idx, (word, _) in enumerate(word_counts)}
+vocab['<unk>'] = len(vocab)
+vocab['<pad>'] = len(vocab)
+vocab['<s>'] = len(vocab)
+vocab['</s>'] = len(vocab)
+
+# Save vocab
+with open('vocab.json', 'w') as f:
+    json.dump(vocab, f)
+print(f"Vocabulary of size {len(vocab)} saved to vocab.json")
\ No newline at end of file
diff --git a/download_corpus.py b/download_corpus.py
new file mode 100644
index 0000000..1e3dcd1
--- /dev/null
+++ b/download_corpus.py
@@ -0,0 +1,36 @@
+import gutenbergpy.textget
+import re
+import glob
+
+
+# Download books by Gutenberg ID
+def download_gutenberg_book(book_id, output_file):
+    try:
+        raw_text = gutenbergpy.textget.get_text_by_id(book_id)
+        # Remove headers/footers
+        text = re.sub(r'\*\*\*.*?\*\*\*', '', raw_text.decode('utf-8'), flags=re.DOTALL)
+        text = re.sub(r'\n+', '\n', text).strip()
+        with open(output_file, 'w', encoding='utf-8') as f:
+            f.write(text)
+    except Exception as e:
+        print(f"Error downloading book {book_id}: {e}")
+
+
+# Download selected books
+books = [
+    (1342, 'pride_and_prejudice.txt'),
+    (45, 'anne_of_green_gables.txt'),
+    (74, 'tom_sawyer.txt')
+]
+for book_id, filename in books:
+    print(f"Downloading book ID {book_id}...")
+    download_gutenberg_book(book_id, filename)
+
+# Combine into corpus
+corpus = ''
+for file in glob.glob('*.txt'):
+    with open(file, 'r', encoding='utf-8') as f:
+        corpus += f.read() + '\n'
+with open('corpus.txt', 'w', encoding='utf-8') as f:
+    f.write(corpus)
+print("Corpus created at corpus.txt")
\ No newline at end of file
diff --git a/finetune_vivi.py b/finetune_vivi.py
new file mode 100644
index 0000000..ef765e4
--- /dev/null
+++ b/finetune_vivi.py
@@ -0,0 +1,68 @@
+import torch
+import torch.nn as nn
+from torch.utils.data import Dataset, DataLoader
+import torch.optim as optim
+import json
+
+# Define model (same as before)
+class VivianTransformer(nn.Module):
+    def __init__(self, vocab_size, d_model=128, n_layers=2, n_heads=4, d_ff=512):
+        super().__init__()
+        self.embedding = nn.Embedding(vocab_size, d_model)
+        self.pos_encoding = nn.Parameter(torch.randn(1, 512, d_model))
+        encoder_layer = nn.TransformerEncoderLayer(d_model, n_heads, d_ff, dropout=0.1)
+        self.transformer = nn.TransformerEncoder(encoder_layer, n_layers)
+        self.fc_out = nn.Linear(d_model, vocab_size)
+    
+    def forward(self, x):
+        x = self.embedding(x) + self.pos_encoding[:, :x.size(1), :]
+        x = self.transformer(x)
+        return self.fc_out(x)
+
+# Conversation dataset
+class ViviDataset(Dataset):
+    def __init__(self, json_file, vocab, max_len=32):
+        with open(json_file, 'r') as f:
+            self.data = json.load(f)
+        self.vocab = vocab
+        self.max_len = max_len
+    
+    def __len__(self):
+        return len(self.data)
+    
+    def __getitem__(self, idx):
+        user = self.data[idx]['user'].lower().split()
+        vivi = self.data[idx]['vivi'].lower().split()
+        seq = [self.vocab['<s>']] + [self.vocab.get(word, self.vocab['<unk>']) for word in user + vivi] + [self.vocab['</s>']]
+        seq = seq[:self.max_len] + [self.vocab['<pad>']] * (self.max_len - len(seq))
+        return torch.tensor(seq[:-1]), torch.tensor(seq[1:])
+
+# Load vocab and data
+with open('vocab.json', 'r') as f:
+    vocab = json.load(f)
+dataset = ViviDataset('vivi_conversations.json', vocab)
+dataloader = DataLoader(dataset, batch_size=8, shuffle=True)
+
+# Load model
+model = VivianTransformer(len(vocab)).cuda()
+model.load_state_dict(torch.load('vivi_base.pt'))
+optimizer = optim.Adam(model.parameters(), lr=0.00005)  # Lower LR for fine-tuning
+criterion = nn.CrossEntropyLoss(ignore_index=vocab['<pad>'])
+
+# Fine-tune
+for epoch in range(10):
+    model.train()
+    total_loss = 0
+    for src, tgt in dataloader:
+        src, tgt = src.cuda(), tgt.cuda()
+        optimizer.zero_grad()
+        output = model(src)
+        loss = criterion(output.view(-1, len(vocab)), tgt.view(-1))
+        loss.backward()
+        optimizer.step()
+        total_loss += loss.item()
+    print(f'Fine-tune Epoch {epoch+1}, Loss: {total_loss / len(dataloader):.4f}')
+
+# Save model
+torch.save(model.state_dict(), 'vivi_finetuned.pt')
+print("Fine-tuned model saved to vivi_finetuned.pt")
\ No newline at end of file
diff --git a/prepare_dataset.py b/prepare_dataset.py
new file mode 100644
index 0000000..1ac975d
--- /dev/null
+++ b/prepare_dataset.py
@@ -0,0 +1,31 @@
+import torch
+from torch.utils.data import Dataset
+import json
+
+
+class TextDataset(Dataset):
+    def __init__(self, corpus_file, vocab, max_len=32):
+        self.vocab = vocab
+        self.max_len = max_len
+        with open(corpus_file, 'r', encoding='utf-8') as f:
+            text = f.read().lower().split()
+        self.tokens = [self.vocab.get(word, self.vocab['<unk>']) for word in text]
+
+    def __len__(self):
+        return len(self.tokens) // self.max_len
+
+    def __getitem__(self, idx):
+        start = idx * self.max_len
+        seq = self.tokens[start:start + self.max_len]
+        if len(seq) < self.max_len:
+            seq += [self.vocab['<pad>']] * (self.max_len - len(seq))
+        return torch.tensor(seq[:-1]), torch.tensor(seq[1:])
+
+# Load vocab
+with open('vocab.json', 'r') as f:
+    vocab = json.load(f)
+
+# Create dataset
+dataset = TextDataset('corpus.txt', vocab)
+torch.save(dataset, 'dataset.pt')
+print("Dataset saved to dataset.pt")
\ No newline at end of file
diff --git a/talk_to_vivi.py b/talk_to_vivi.py
new file mode 100644
index 0000000..ba05108
--- /dev/null
+++ b/talk_to_vivi.py
@@ -0,0 +1,109 @@
+import torch
+import torch.nn as nn
+import json
+
+# Define model
+class VivianTransformer(nn.Module):
+    def __init__(self, vocab_size, d_model=128, n_layers=2, n_heads=4, d_ff=512):
+        super().__init__()
+        self.embedding = nn.Embedding(vocab_size, d_model)
+        self.pos_encoding = nn.Parameter(torch.randn(1, 512, d_model))
+        encoder_layer = nn.TransformerEncoderLayer(d_model, n_heads, d_ff, dropout=0.1)
+        self.transformer = nn.TransformerEncoder(encoder_layer, n_layers)
+        self.fc_out = nn.Linear(d_model, vocab_size)
+    
+    def forward(self, x):
+        x = self.embedding(x) + self.pos_encoding[:, :x.size(1), :]
+        x = self.transformer(x)
+        return self.fc_out(x)
+
+# Check device
+device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
+print(f"Using device: {device}")
+if device.type == 'cuda':
+    print(f"GPU: {torch.cuda.get_device_name(0)}")
+else:
+    print("Warning: CUDA not available. Running on CPU will be slower.")
+
+# Load vocab
+try:
+    with open('vocab.json', 'r') as f:
+        vocab = json.load(f)
+except FileNotFoundError:
+    print("Error: vocab.json not found. Run build_tokenizer.py first.")
+    exit(1)
+
+# Load model
+try:
+    model = VivianTransformer(len(vocab)).to(device)
+    model.load_state_dict(torch.load('vivi_finetuned.pt', map_location=device))
+except FileNotFoundError:
+    print("Error: vivi_finetuned.pt not found. Trying vivi_base.pt...")
+    try:
+        model.load_state_dict(torch.load('vivi_base.pt', map_location=device))
+    except FileNotFoundError:
+        print("Error: vivi_base.pt not found. Run train_vivi.py first.")
+        exit(1)
+except Exception as e:
+    print(f"Error loading model: {e}")
+    exit(1)
+model.eval()
+
+# Reverse vocab for decoding
+id2word = {idx: word for word, idx in vocab.items()}
+
+# Context memory
+context_memory = []
+memory_size = 5
+
+def generate_response(prompt, max_len=32, p=0.9):
+    global context_memory
+    context_memory.append(prompt)
+    if len(context_memory) > memory_size:
+        context_memory = context_memory[-memory_size:]
+    input_text = ' '.join(context_memory).lower()
+    input_ids = [vocab['<s>']] + [vocab.get(word, vocab['<unk>']) for word in input_text.split()]
+    input_tensor = torch.tensor([input_ids], device=device)
+    
+    with torch.no_grad():
+        for _ in range(max_len - len(input_ids)):
+            output = model(input_tensor)
+            logits = output[:, -1, :]
+            probs = torch.softmax(logits, dim=-1)
+            probs, indices = probs.sort(descending=True)
+            cum_probs = torch.cumsum(probs, dim=-1)
+            mask = cum_probs <= p
+            if not mask.any():
+                mask[0] = True
+            probs = probs[mask]
+            indices = indices[mask]
+            next_word_id = torch.multinomial(probs, 1).item()  # Get scalar index
+            next_word_tensor = torch.tensor([[indices[next_word_id]]], device=device)
+            input_tensor = torch.cat([input_tensor, next_word_tensor], dim=1)
+            if indices[next_word_id].item() == vocab['</s>']:
+                break
+
+    response_ids = input_tensor[0, len(input_ids):].tolist()
+    response = ' '.join(id2word.get(idx, '<unk>') for idx in response_ids if idx != vocab['<pad>'])
+    context_memory.append(response)
+    return response
+
+# Save conversations
+conversations = []
+try:
+    with open('vivi_conversations.json', 'r') as f:
+        conversations = json.load(f)
+except FileNotFoundError:
+    pass
+
+# Interactive loop
+print("Chat with Vivi! Type 'exit' or 'quit' to stop.")
+while True:
+    user_input = input("You: ")
+    if user_input.lower() in ['exit', 'quit']:
+        break
+    response = generate_response(user_input)
+    print(f"Vivi: {response}")
+    conversations.append({"user": user_input, "vivi": response})
+    with open('vivi_conversations.json', 'w') as f:
+        json.dump(conversations, f, indent=2)
\ No newline at end of file
diff --git a/train_vivi.py b/train_vivi.py
new file mode 100644
index 0000000..e6084b7
--- /dev/null
+++ b/train_vivi.py
@@ -0,0 +1,94 @@
+import torch
+import torch.nn as nn
+from torch.utils.data import Dataset, DataLoader
+import torch.optim as optim
+import json
+
+# Define TextDataset
+class TextDataset(Dataset):
+    def __init__(self, corpus_file, vocab, max_len=32):
+        self.vocab = vocab
+        self.max_len = max_len
+        with open(corpus_file, 'r', encoding='utf-8') as f:
+            text = f.read().lower().split()
+        self.tokens = [self.vocab.get(word, self.vocab['<unk>']) for word in text]
+    
+    def __len__(self):
+        return len(self.tokens) // self.max_len
+    
+    def __getitem__(self, idx):
+        start = idx * self.max_len
+        seq = self.tokens[start:start + self.max_len]
+        if len(seq) < self.max_len:
+            seq += [self.vocab['<pad>']] * (self.max_len - len(seq))
+        return torch.tensor(seq[:-1]), torch.tensor(seq[1:])
+
+# Define model
+class VivianTransformer(nn.Module):
+    def __init__(self, vocab_size, d_model=128, n_layers=2, n_heads=4, d_ff=512):
+        super().__init__()
+        self.embedding = nn.Embedding(vocab_size, d_model)
+        self.pos_encoding = nn.Parameter(torch.randn(1, 512, d_model))
+        encoder_layer = nn.TransformerEncoderLayer(d_model, n_heads, d_ff, dropout=0.1)
+        self.transformer = nn.TransformerEncoder(encoder_layer, n_layers)
+        self.fc_out = nn.Linear(d_model, vocab_size)
+    
+    def forward(self, x):
+        x = self.embedding(x) + self.pos_encoding[:, :x.size(1), :]
+        x = self.transformer(x)
+        return self.fc_out(x)
+
+# Check device
+device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
+print(f"Using device: {device}")
+if device.type == 'cuda':
+    print(f"GPU: {torch.cuda.get_device_name(0)}")
+else:
+    print("Warning: CUDA not available. Training on CPU will be slower.")
+
+# Load vocab
+try:
+    with open('vocab.json', 'r') as f:
+        vocab = json.load(f)
+except FileNotFoundError:
+    print("Error: vocab.json not found. Run build_tokenizer.py first.")
+    exit(1)
+
+# Load dataset
+try:
+    dataset = torch.load('dataset.pt')
+except FileNotFoundError:
+    print("Error: dataset.pt not found. Run prepare_dataset.py first.")
+    exit(1)
+except Exception as e:
+    print(f"Error loading dataset.pt: {e}")
+    exit(1)
+
+# Create dataloader
+dataloader = DataLoader(dataset, batch_size=16, shuffle=True)
+
+# Initialize model
+model = VivianTransformer(len(vocab)).to(device)
+optimizer = optim.Adam(model.parameters(), lr=0.0001)
+criterion = nn.CrossEntropyLoss(ignore_index=vocab['<pad>'])
+
+# Train
+print("Starting training...")
+for epoch in range(5):
+    model.train()
+    total_loss = 0
+    for batch_idx, (src, tgt) in enumerate(dataloader):
+        src, tgt = src.to(device), tgt.to(device)
+        optimizer.zero_grad()
+        output = model(src)
+        loss = criterion(output.view(-1, len(vocab)), tgt.view(-1))
+        loss.backward()
+        optimizer.step()
+        total_loss += loss.item()
+        if batch_idx % 100 == 0:
+            print(f"Epoch {epoch+1}, Batch {batch_idx}, Loss: {loss.item():.4f}")
+    print(f'Epoch {epoch+1}, Average Loss: {total_loss / len(dataloader):.4f}')
+
+# Save model
+torch.save(model.state_dict(), 'vivi_base.pt')
+print("Model saved to vivi_base.pt")
\ No newline at end of file