# Charcoal, 17 bytes

    (Ｍ↙↓⁻θ¹Ｍ↑(Ｍ→↗Ｉθ‖Ｍ

[Try it online!](https://tio.run/##S85ILErOT8z5/1/j/Z61j9pmPmqb/Khx97kdh3aC@RMhwpMetU1/v2fluR2PGqYBBf7/NwYA)