Object: redistribute the robots so that all board positions are covered by laser rays.

You start with with a fixed setup of robots and walls.
Click an empty position on the board to let the system draw the laser rays.

The laser rays radiate from each of the robots in all four directions.
The length of the laser rays increases with each step from 0,1,2,3,4,5 to 6, then back to 0 in the next step.
The robots show the ray length as number on their front, also this number is associated with the colors of the robots.
The rays are blocked by walls and robots.

You can move a robot left, right, up or down as far as there are no walls or other robots.
Positions that are not covered (by rays or robots) are marked with a black dot.
You win if there are no uncovered positions.

Beginners Level: cover all positions
Expert level: cover all positions in as few moves as possible.
A move counter and the best result are shown at the right border.

Variants:
There are several variants with randomized setups.

Solutions for the variants with fixed setups are attached.