def edge_color(self, edge):
     value = float(edge.time.fraction)
     return Color.hsv(value / 2 + .5, value, 0.7)
 def edge_color(self, edge):
     value = float(edge.time.fraction)
     return Color.hsv(value / 2 + .5, value, 0.7)
 def node_color(self, node):
     value = float(node.time.fraction)
     return Color.hsv(value / 2 + .5, value, 0.9)
 def node_color(self, node):
     value = float(node.time.fraction)
     return Color.hsv(value / 2 + .5, value, 0.9)