External display and time.sleep patches.

[caternuson]

Fixes #10 and #11. Also removed deprecated displayio calls.

Please let me know if these test are not adequate for #10.

Built In Display Test

PyPortal w/ CP 4.1.0

import board
from adafruit_turtle import Color, turtle

turtle = turtle(board.DISPLAY)
benzsize = min(board.DISPLAY.width, board.DISPLAY.height) * 0.5

print("Turtle time! Lets draw a rainbow benzene")

colors = (Color.RED, Color.ORANGE, Color.YELLOW, Color.GREEN, Color.BLUE, Color.PURPLE)

turtle.pendown()
start = turtle.pos()

for x in range(benzsize):
    turtle.pencolor(colors[x%6])
    turtle.forward(x)
    turtle.left(59)

while True:
    pass

External Display Test

CPB w/ CP 5.0.0 alpha 4

import board
import busio
import displayio
from adafruit_st7789 import ST7789
from adafruit_turtle import Color, turtle

displayio.release_displays()

spi = busio.SPI(board.SCL, MOSI=board.SDA)
tft_cs = board.RX
tft_dc = board.TX
tft_backlight = board.A3

display_bus = displayio.FourWire(spi, command=tft_dc, chip_select=tft_cs)

display = ST7789(display_bus, width=240, height=240, rowstart=80,
                 backlight_pin=tft_backlight, rotation=180)

turtle = turtle(display)
benzsize = min(display.width, display.height) * 0.5

print("Turtle time! Lets draw a rainbow benzene")

colors = (Color.RED, Color.ORANGE, Color.YELLOW, Color.GREEN, Color.BLUE, Color.PURPLE)

turtle.pendown()
start = turtle.pos()

for x in range(benzsize):
    turtle.pencolor(colors[x%6])
    turtle.forward(x)
    turtle.left(59)

while True:
    pass

[ladyada]

yay!