magic-eye.ijs

dw =.  10
dw2 =. dw
hw =. 5 50
tl =. '..' ((-,+)/>.-:dw2,~{:hw) } 40 # ' '
bg0 =. hw $ a.i.'.'
bg1 =. 26 | (]+ ] = dw |. ]) hw $? (*/hw)#26
bg1 =. 65 + bg1
bg =. a. {~ bg1
el =. "_1 _
lf =. 15
sp =. 1
ix =. dyad : ', x ,&.> (lf+0,dw) +el sp * i.y'
h  =. 'HELLO'
w  =. 'WORLD'
tl, (,~w) (3 3 ix #w) } (,~h) (1 1 ix #h) } bg