diff --git a/reactiontimer.py b/reactiontimer.py
new file mode 100644
index 0000000..ce10e4a
--- /dev/null
+++ b/reactiontimer.py
@@ -0,0 +1,57 @@
+import tkinter as tk
+import random
+import time
+from tkinter import messagebox
+
+class ReactionTimerGame:
+    def __init__(self, root):
+        self.root = root
+        self.root.title("Reaction Timer: Color Change")
+        self.root.geometry("400x200")
+
+        self.label = tk.Label(self.root, text="Wait for the button to turn green...", font=("Helvetica", 14))
+        self.label.pack(pady=20)
+
+        self.button = tk.Button(self.root, text="Click Me!", bg="gray", font=("Helvetica", 14), width=20, height=2, state=tk.DISABLED)
+        self.button.pack(pady=20)
+        self.button.bind("<Button-1>", self.check_reaction)
+
+        self.start_button = tk.Button(self.root, text="Start", command=self.start_game, font=("Helvetica", 14), width=10)
+        self.start_button.pack(pady=20)
+
+        self.start_time = 0
+        self.is_ready = False
+
+    def start_game(self):
+        self.start_button.config(state=tk.DISABLED)
+        self.label.config(text="Get Ready...")
+        self.button.config(bg="gray", state=tk.DISABLED)
+
+        delay = random.uniform(2, 5)  # Random delay between 2 and 5 seconds
+        self.root.after(int(delay * 1000), self.activate_button)
+
+    def activate_button(self):
+        self.button.config(bg="green", state=tk.NORMAL)
+        self.label.config(text="Click now!")
+        self.start_time = time.time()
+        self.is_ready = True
+
+    def check_reaction(self, event):
+        if self.is_ready:
+            reaction_time = time.time() - self.start_time
+            self.is_ready = False
+            messagebox.showinfo("Reaction Time", f"Your reaction time: {reaction_time:.3f} seconds")
+        else:
+            messagebox.showwarning("Too Soon!", "You clicked too soon!")
+
+        self.reset_game()
+
+    def reset_game(self):
+        self.button.config(bg="gray", state=tk.DISABLED)
+        self.label.config(text="Wait for the button to turn green...")
+        self.start_button.config(state=tk.NORMAL)
+
+if __name__ == "__main__":
+    root = tk.Tk()
+    game = ReactionTimerGame(root)
+    root.mainloop()