if (e.getKeyCode()KeyEvent.VK UP) When the state of the tetromino changes, repaint the component. suitable timer speed. When the timer expires: . The falling of the tetromino can be controlled by timers. Start with 500ms and choose a - calculate the new position of the tetromino. If the new position is valid within the grid, then the tetromino should fall by one row; otherwise the tetromino is embedded into the grid, and a new tetromino is introduced.4 - When the new position is set, repaint the component. . Tetromino rotation: When the arrow up key is pressed, the tetromino should rotate. However the rotation can only be performed, if the resulting tetromino fits within the grid. e The grid can use a two dimensional array as internal representation. e.g., Block [10] [20] - Consider to use a grid that is larger than what is displayed on the screen (e.g., Block [16] [25] This will help to test whether a rotated or falling tetromino fits within the grid. For example, three pseudo columns on each side, and three pseudo rows at the bottom could be filled with pseudo blocks. This way you can avoid testing whether a point in the tetromino is within the grid bounds.) if (e.getKeyCode()KeyEvent.VK UP) When the state of the tetromino changes, repaint the component. suitable timer speed. When the timer expires: . The falling of the tetromino can be controlled by timers. Start with 500ms and choose a - calculate the new position of the tetromino. If the new position is valid within the grid, then the tetromino should fall by one row; otherwise the tetromino is embedded into the grid, and a new tetromino is introduced.4 - When the new position is set, repaint the component. . Tetromino rotation: When the arrow up key is pressed, the tetromino should rotate. However the rotation can only be performed, if the resulting tetromino fits within the grid. e The grid can use a two dimensional array as internal representation. e.g., Block [10] [20] - Consider to use a grid that is larger than what is displayed on the screen (e.g., Block [16] [25] This will help to test whether a rotated or falling tetromino fits within the grid. For example, three pseudo columns on each side, and three pseudo rows at the bottom could be filled with pseudo blocks. This way you can avoid testing whether a point in the tetromino is within the grid bounds.)