Example of code skulptor exercise that use timer

code_skulptor_timer_example.py

import simplegui


time = 0
points = 0

def format(time):
    A = time // 600
    B = time // 60
    C = time % 60
    D = 0
    converted = str(A) + ":" + str(B) + str(C) + "." + str(D)
    return converted

  

def start_button():   
    timer.start()

def stop_button():
    #global points, time
    timer.stop()
  
  
def reset_button():
    global time
    time = 0
    return time



def timer_handler():
    global time
    time += 1
    return time


def draw_time(canvas):
    global time
    text = format(time)
    canvas.draw_text(text, [175,100], 15, "white")
    

frame = simplegui.create_frame("Stopwatch", 350, 200)
timer = simplegui.create_timer(1000, timer_handler)


frame.add_button("Start", start_button, 70)
frame.add_button("Stop", stop_button, 70)
frame.add_button("Reset", reset_button, 70)
frame.set_draw_handler(draw_time)


frame.start()