RosettaCodeData/Task/Visualize-a-tree/Lingo/visualize-a-tree-2.lingo

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-- create a tree
root = script("TreeItem").new("root")
a = script("TreeItem").new("a")
root.addChild(a)
b = script("TreeItem").new("b")
root.addChild(b)
a1 = script("TreeItem").new("a1")
a.addChild(a1)
a11 = script("TreeItem").new("a11")
a1.addChild(a11)
a12 = script("TreeItem").new("a12")
a1.addChild(a12)
b1 = script("TreeItem").new("b1")
b.addChild(b1)
-- print the tree
root.printTree()