| PASS - "left" property for "box" element at 1s saw something close to: 200 | |
| PASS - "left" property for "box" element at 2s saw something close to: 0 | |
| PASS - "left" property for "box" element at 3s saw something close to: 200 | |
| PASS - "left" property for "box" element at 4s saw something close to: 400 | |