Clicca sul link qui sotto e metti le mani davanti alla webcam : https://www.shadertoy.com/view/WtjGDz // This is a rework of https://www.shadertoy.com/view/lssGDj, // created by movAX13h, with sound, by Radical Ed float character(int n, vec2 p) { p = floor(p*vec2(4.0, -4.0) + 2.5);    
#define PERIOD 2. #define REPETITIONS 2 const float PI = 3.1415926535; float box(in vec2 _st, in vec2 _size){     _size = vec2(0.5) - _size*0.5;     vec2 uv = smoothstep(_size,                        
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