To explore these patterns, choose the multiples to colour from the palette. If Blend is selected, then if a number is a multiple of more than 1 of the selected numbers, any squares with that number are coloured using a combination of the individual multiple colours. Otherwise, the square is coloured according to the largest multiple.
Click Random to randomise the colour palette, or click any colour to choose a particular colour for that multiple.
Select a size for the grid using the slider, and press and hold the Hold to hide numbers button to hide the numbers and just show the pure pattern.