Click the board to randomize the setup. Randomly coloured squares will appear plus one robot placed in the lower left corner.

To play, you must first associate 'left' (L) or 'right' (R) commands to as many colours as you like.
Then click the robot repeatedly to make it go. The Robot moves orthogonally until it encounters a colour which is marked 'right' (R), 'left' (L) or 'back' (B) on the left border, in which case it turns 90 degrees or reverses its direction of walking.
The robots always starts in the bottom left corner, facing east. You can make it face north at the start by clicking the green border at the bottom left corner.

You cannot reprogram the robot (change the RLB-table) while it is walking. You can, however, reprogram the robot (in the default variant) when it is positioned at the centre or at one of the corners of the board.

In the default variant you win when the robot has visited all four corners and the center. You lose when the robot is about to run off the board. In this case its circuits fry and it perishes.

Variants: some variants play on the 7x7 board, some on the 9x9 board.
Depending on the goal, there are two types of variants:
Type 1 (default): The robot must visit the centre, and all four corners including a re-visit to the bottom left corner. The visited positions will be highlighted at the border. When the robot is positioned at one of these five special points you can reprogram the colour settings. Otherwise the settings are fixed.
Type 2 : The robot must visit the top right corner. No reprogramming is possible after the robot has started walking!

Fixed variants: there are several fixed variants; all of type 2. All fixed variants come with solutions (click Help/ShowSolution).
Not all setups created by the random variants might be solvable.