@ZeM3dic9111 the first method is to use the SLATE and remaining 15 pairs, then you will get with two sets of Numbers, light is not the same group, bright is different groups, to complete this step you can determine the location of the 1 and the rest a set number of all position. After that, it's easy to determine the number position of one group, which is a lot easier, and the two groups will be able to set the coordinates when they light up the floor.Make a table like this to record the position of the corresponding SLATE