
                    return false;
                }
            }
            return true;
        }
        return testList(blockList, 0) && testList(allowList, 255);
    };
    function verifyDraw(drawNumber, s) {
        gl.clearColor(1.0, 1.0, 1.0, 1.0);
        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
        gl.drawElements(gl.TRIANGLES, 6, gl.UNSIGNED_INT, 0);

        var blockList = [];
        var allowList = [];
        var points = [0.0, 0.2, 0.4, 0.6, 0.8, 1.0];
        for (var n 