import math
from gpanel import *

class Myturtle:
    def __init__(self):
        # Position:
        self.x=0
        self.y=0
        # Winkel
        self.a = 0
        # Schrittweite
        self.l = 10
        move(self.x, self.y)
        
    def forward(self, draw=True):          
        self.x += self.l * math.cos(self.a)
        self.y += self.l * math.sin(self.a)
        if draw:
            lineTo(self.x, self.y)
        else:
            move(self.x, self.y)
            
    
    def turn(self,a):
        self.a+=a/180.0*math.pi
        


if __name__=="__main__":
    makeGPanel(-20, 20, -20, 20)
    t = Myturtle()
    for i in range(5):
        t.forward()
        t.turn(72)