text: from Drawing import *
  
  s = Drawing()
  
  s.addColor("tPink", "#FF9896") # 255, 152,150
  
  s.addNode("a")
  s.addNode("b", [(0,4), (5,10)])
  s.addNode("c", [(4,9)])
  s.addNode("d", [(1,3)])
  
  #s.addPath([(1,"b","a"), (4.5,"a","c"), (6, "c", "b")], 1, 5, color=11, width=6)
  #s.addPath([(2,"b","d")], 1, 1, color=11, width=6)
  
  s.addLink("a", "b", 1, 1, color=11, width=6)
  s.addLink("b", "d", 2, 2, color=11, width=6)
  s.addLink("a", "c", 4.5, 4.5, color=11, width=6)
  s.addLink("b", "c", 6, 6, color=11, width=6)
  
  s.addLink("a", "b", 1, 3)
  s.addLink("b", "d", 2, 3)
  s.addLink("a", "c", 4.5, 7.5, height=0.40)
  s.addLink("a", "b", 7, 8)
  s.addLink("b", "c", 6, 9)
  
  s.addTimeNodeMark(0,"b",color="tPink",width=4)
  
  s.addNodeCluster("a", [(1,4.5)], color=11, width=60)
  s.addNodeCluster("b", [(0,2),(6,6)], color=11, width=60)
  s.addNodeCluster("c", [(4.5,6)], color=11, width=60)
  s.addNodeCluster("d", [(2,2)], color=11, width=60)
  
  s.addTimeLine(ticks=2)
  