Running out of space

hi.

this first post here hope correct.

i have had arduino couple of weeks , have never programmed before.

i have built 6x6x6 cube 74hc238. (can them school) know not smartest way, want learn in process.

i have had 6 days of electrical education in school, mechanical engineer , excuse ignorance in electronics , programming

problem running out of space program.. can me kind of smart work around? dont know how optimize program size.

i have attached program.

thank much
ronni
denmark

it may not save space program crying out arrays , loops used instead of acres of repeated code.

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