# drawing.py
# ----------
# By Jannatun Uddin
#
# (Briefly describe what this program does.)
from superturtle.animation import animate
from turtle import forward, left, penup, pendown, fillcolor, begin_fill, end_fill

def draw_building(width, height, color="gray"):
    fillcolor(color)
    begin_fill()
    for i in range(2):
        forward(width)
        left(90)
        forward(height)
        left(90)
    end_fill()

# Animation loop
for frame in animate(40, loop=True):
    brightness = int(frame.interpolate(100, 200, mirror=True))  


    # First building
    penup()
    pendown()
    draw_building(60, 100, color)

    # Second building
    penup()
    forward(80)
    pendown()
    draw_building(50, 120, color)

    # Third building
    penup()
    forward(70)
    pendown()
    draw_building(70, 90, color)
input()