#!/usr/bin/env python3
import random
import math
def circle(ctx,x,y,r):
    ctx.arc(x,y,r,0,math.pi*2.)
    ctx.stroke()


def circle_fill(ctx,x,y,r):
    ctx.arc(x,y,r,0,math.pi*2.)
    ctx.fill()


def random_color():
    red = random.uniform(0, 1)
    green = random.uniform(0, 1)
    blue = random.uniform(0, 1)
    return red, green, blue