code: function renderScene () {
      gl.clearColor(0, 0, 0, 1)
      gl.clear(gl.COLOR_BUFFER_BIT)
      gl.viewport(0, 0, shape[0], shape[1])
      shader.bind()
      shader.uniforms.iResolution = shape
      shader.uniforms.iGlobalTime = 0
      triangle(gl)
    }
docs: can be any type of render function