import time
import board
import displayio
import vectorio


def increment_color(shape):
    if shape.color_index + 1 < len(shape.pixel_shader):
        shape.color_index += 1
    else:
        shape.color_index = 0


display = board.DISPLAY
main_group = displayio.Group()

palette = displayio.Palette(4)
palette[0] = 0x125690
palette[1] = 0x34BB90
palette[2] = 0xAA1220
palette[3] = 0xAA04BA

circle = vectorio.Circle(pixel_shader=palette, radius=25, x=25, y=25)
main_group.append(circle)

rectangle = vectorio.Rectangle(pixel_shader=palette, width=50, height=50, x=25, y=75)
main_group.append(rectangle)

points = [(5, 5), (70, 20), (35, 35), (20, 70)]
polygon = vectorio.Polygon(pixel_shader=palette, points=points, x=145, y=55)
main_group.append(polygon)

display.show(main_group)

while True:
    for x in range(25, display.width - 25):
        circle.x = x
        time.sleep(0.01)

    increment_color(circle)
    increment_color(rectangle)
    increment_color(polygon)

    for x in range(display.width - 25, 25, -1):
        circle.x = x
        time.sleep(0.01)

    increment_color(circle)
    increment_color(rectangle)
    increment_color(polygon)