import turtle

def sq(a):
  for i in range(4):
    turtle.color(colors[i%4])
    turtle.forward(a)
    turtle.left(90)

colors = ['red','brown','green','blue']
turtle.speed(100)

dlina = 100
for i in range(50):
  
  sq(dlina)
  turtle.right(10)
  dlina = dlina+1