Mini Lights Out

The game is called "Mini Lights Out". It is played on a 4×4 board wrapped on a torus. That is, the uppermost and lowermost rows are considered neighbors and, likewise, the leftmost and rightmost columns are considered neighbors. The task is to switch all the buttons off. Each button is embedded into a neighborhood of five buttons according to the 4-connectedness rules, i.e., a button's neighborhood includes the button itself and its vertical and horizontal neighbors. All neighborhoods on the torus consist of five buttons. When a button is pressed, all the buttons in its neighborhood are affected and change their states.

 
What if applet does not run?

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