Incomplete improvement (Anchor object)

vgl/basic_elements.py

@@ -1,10 +1,13 @@
 from vgl.main import *
 import pygame
 import time
+
 class Line(Element):
     def __init__(self, ends = [(0.1, 0.1), (0.2, 0.2)], color = "#ffffff"):
         self.color = color
         self.ends = ends
+    def set_color(self, new_color):
+        self.color = new_color
     def move(self, delta, duration):
         self.add_task(group = "move", start_time = Aux.gettime(), duration = duration, delta = delta)
     def update(self):