1  &fras ⊣ &args
 2  
 3  ⊜(⊙[∩∩⋕] ⍣(
 4      ≍"on"°$"turn _ _,_ through _,_"
 5    | 2°$"toggle _,_ through _,_")
 6  )≠@\n.
 7  
 8  ⊙⊙(↯[.1000]0)
 9  
10  Solve! ← /+♭∧(⍜⊡(^0:) ⍜⍜⍉-(♭₂⇡) ⊙(+1)∩⊟°[⊙⊙⊙∘]⊙::)
11  ⊃Solve!⨬(↥0-1|+1|+2) Solve!⨬(↧0|↥1|¬)