cls12 RGB
import turtle
count = 0
pos_y = 0
while count<3:
turtle.penup()
turtle.goto(0,pos_y)
turtle.pendown()
turtle.colormode(255)
turtle.fillcolor(count*20+10,count*15+50,count*20)
turtle.begin_fill()
turtle.circle(100-pos_y,360)
turtle.end_fill()
count+=1
pos_y+=20
turtle.done()
