code: function() {
  		var gl = this.gl;
  
  		var program = gl.createProgram();
  		gl.attachShader( program, this.vertexShader );
  		gl.attachShader( program, this.fragmentShader );
  		gl.linkProgram( program );	
  		gl.useProgram( program );
  
  		this.program = program;
  	}
docs: Initialize WebGL program.