simpleturtle.py

import pygame
from math import sin, cos, radians

linefunc = pygame.draw.line
color = 255,255,255
class Turtle:
    def __init__(self, surf, pos=(0,0)):
        self.surf = surf
        self.x = pos[0]; self.y = pos[1]
        self.drawing = True
        self.angle = 0
   
    def right(self, delta):
        self.angle -= delta 
        self.angle %= 360
  
    def left(self, delta):
        self.angle += delta 
        self.angle %= 360
  
    def forward(self, length):
        tpos = self.x + length * cos(radians(self.angle)), self.y + length * sin(radians(self.angle))
        if self.drawing:
            linefunc(self.surf, color, (self.x, self.y), tpos)
        self.x, self.y = tpos