# Polyline drawing in codeskulptor

import simplegui
import math

polyline = []

def click(pos):
    global polyline
    polyline.append(pos)
          
def clear():
    global polyline
    polyline = []

def draw(canvas):
    if len(polyline) == 1:
            canvas.draw_point(polyline[0] , "White")
    for i in range(1 ,len(polyline)):
        canvas.draw_line(polyline[i-1] ,polyline[i] ,2 ,"White" )
                   
frame = simplegui.create_frame("Echo click", 300, 200)
frame.set_mouseclick_handler(click)
frame.set_draw_handler(draw)
frame.add_button("Clear", clear)

frame.start()