Stopwatch: The game (Mini project)

# template for "Stopwatch: The Game"
import simplegui

# define global variables

tenths_of_seconds = 0
minutes = 0
seconds = 0
tens_of_seconds = 0
width = 500
height = 500
total = 0
x = 0
y = 0
z = 0.0

# define helper function format that converts time
# in tenths of seconds into formatted string A:BC.D
def format(t):
    global tenths_of_seconds, minutes, tens_of_seconds, seconds
    minutes = t//600
    tenths_of_seconds = t%10
    seconds = ((t//10)%60)//10
    tens_of_seconds = ((t//10)%60)%10

    return str(minutes) + ":" + str(seconds) + str(tens_of_seconds)+ "." + str(tenths_of_seconds)


# define event handlers for buttons; "Start", "Stop", "Reset"

def start():
    timer.start()


def stop():
    global x, y, tenths_of_seconds, z
    if timer.is_running():
        x += 1
        if tenths_of_seconds == 0:
            y += 1
    z = (float(y)/float(x))*100
    timer.stop()

def reset():
    timer.stop()
    global total, x, y, z
    total = 0
    x = 0
    y = 0
    z = 0.0


# define event handler for timer with 0.1 sec interval
def t_h():
    global total
    total += 1

# define draw handler
def draw_handler(canvas):
    canvas.draw_text(format(total), [200, height/2], 64, "White")
    canvas.draw_text(str(x) + "/" + str(y), [445, 50], 24, "Yellow")
    canvas.draw_text("Win percentage: " + str(round(z, 2)) + "%", [130, 450], 29, "Magenta")

# create frame
frame = simplegui.create_frame("Stopwatch: The Game", width, height)


# register event handlers

frame.set_draw_handler(draw_handler)
timer = simplegui.create_timer(100, t_h)
button1 = frame.add_button("Start", start, 100)
frame.add_label(" ")
button1 = frame.add_button("Stop", stop, 100)
frame.add_label(" ")
button2 = frame.add_button("Reset", reset, 100)

# start frame
frame.start()