TETRIS               SOURCE CODE   Here is the source code of the Tetris applet and its variants Startris and Coltris.   Tetris.java Central part of the applet. TetrisRule.java Describes the rules of the classic Tetris. TetrisPart.java Defines the parts of the classic Tetris.   StartrisRule.java Describes the rules of the Startris variant. StartrisPart.java Defines the parts of the Startris variant.   ColtrisRule.java Describes the rules of the Coltris variant. ColtrisPart.java Defines the parts of the Coltris variant.