"https://i.imgur.com/v38pV.jpg",
  crossOrigin: '',
});

var uniforms = {
  tex: texture,
  time: 0,
};
  
var programIndex = 0;
var programInfos = [
  programInfo1,
  programInfo2,
];
    
function nextProgram() {
  programIndex = (programIndex + 1) % programInfos.length;
}
window.addEventListener('keydown', nextProgram);
window.addEventListener('mousedown', nextProgram);
window.addEventListener('touchstart', nextProgram);
  
      
function render(time) {
  uniforms.time = time * 0.001;

  twgl.resizeCanv