figure the rbtree workshop applet clicking on node the red arrow points to the currently selected node it' this node whose color is changed or which is the top node in rotation you select node by single-clicking it with the mousewhich moves the red arrow to the node the start button when you first start the rbtree workshop appletand also when you press the start buttonyou'll see that tree with only one node is created because an understanding of red-black trees focuses on using the red-black rules during the insertion processit' more convenient to begin with the root and build up the tree by inserting additional nodes to simplify future operationsthe initial root node is always given value of you select your own numbers for subsequent insertions the ins button the ins button causes new node to be createdwith the value that was typed into the number boxand then inserted into the tree (at least this is what happens if no color flips are necessary see the section on the flip button for more on this possibility notice that the ins button does complete insertion operation with one pushmultiple pushes are not required as they were with the binary tree workshop applet in the preceding it' therefore important to type the key value before pushing the button the focus in the rbtree applet is not on the process of finding the place