Read the letters on the glowing bulbs (the cutouts) in the correct order
The card can be folded in different ways without creating new creases.
The letters of “PUZZLE” are intentionally colorful.
Fold the card six times, so that the bulbs of the same color can be seen through the glowing cutouts on each page. Read the letters on every page ranging them according to the numbers beside the cutouts. The order of the pages matches the order of the colors in the word “PUZZLE”.
The solution is “Dots arrange the black bulbs”