You can use any algorithm to generate a perfect maze. The recursive backtracker is a good choice.
| Character | Name | Unicode |
|---|---|---|
| ┌ | box drawings light down and right | U+250C |
| ─ | box drawings light horizontal | U+2500 |
| ┬ | box drawings light down and horizontal | U+252C |
| ┐ | box drawings light down and left | U+2510 |
| │ | box drawings light vertical | U+2502 |
| └ | box drawings light up and right | U+2514 |
| ┴ | box drawings light up and horizontal | U+2534 |
| ┘ | box drawings light up and left | U+2518 |
| ├ | box drawings light vertical and right | U+2520 |
| ⇨ | rightwards white arrow | U+21E8 |