Test passes if there is no red visible.
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |
| st | st | st | st | st | st | st | st | st | st | st | st |