diff --git a/main.py b/main.py
index 2878c22..55dd698 100644
--- a/main.py
+++ b/main.py
@@ -77,15 +77,18 @@ import random
 random.seed(505)
 random.shuffle(passengers)
 toad = 0
+btime = 10 #passengers board every btime ticks
+
 
 import os
 
 def nunty(x):
     if x is None: return -1
     return x
-def tick():
+def tick(t):
     done=True
     global toad
+    global btime
     # print grid
     for row in grid:
         for guy in row:
@@ -98,7 +101,7 @@ def tick():
         print()
     print("---")
     print(grid[3][0].occupant, grid[3][1].occupant, passengers[nunty(grid[3][1].occupant)].dest)
-    if toad < len(passengers) and grid[3][0].occupant is None:
+    if toad < len(passengers) and grid[3][0].occupant is None and t % btime == 0:
         grid[3][0].occupant = toad #added
         passengers[toad].curr = (3, 0)
         toad += 1
@@ -124,7 +127,9 @@ def tick():
         exit()
 
 def run():
+    t = 0
     while 1:
-        tick()
+        tick(t)
+        t += 1
 
 run()