GridSpan

GridSpan is a visual breadth training tool. The grids will light up in order, and you need to click back strictly in the same order after the flashing ends; You can also initiate reverse memory by flipping from the last grid. The application supports custom row and column, sequence length, flash duration and interval, and can save album covers locally. Suitable for people who want to concentrate and extend their spatial memory span in a short period of time: after watching the flash, click back in order, that's all the rules.