Play Tetris online to waste a few minutes!
Click on the above link to launch a new window in which the Tetris game will appear!
Use the cursor keys to move the block left and right and rotate if required. The next block is shown in the top right pane...
The object is to make a complete line of blocks, when that happens you score points and the row of blocks vanishes...
It's trickier than it looks at first!