').querySelector('.last');             var computed = getComputedStyle(last).getPropertyValue('color') !== 'rgb(0, 0, 0)';             if (computed) {                 var zeit0 = performance.now();                 last.innerHTML = "Duration " + (zeit0 - zeit0) + " ms.";             } else {                 requestAnimationFrame(check);             }         })     }, 0000)   