Stepper motor - skipping steps


hello, building laser harp tutorial on instructables. copied code , edited working easy driver , hairless midi. working, stepper skips every second step, beam pattern looks on picture (there supposed 8 beams 1 skipped every rotation).
i can't see problem code maybe wrong. can please me it? --> my code

i tried code command, unexpectedly rotating around. long code above laser more light, prefer more shorted.

reply, , attach code (attach button below reply box).
we can't pastebin.com


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Stepper motor - skipping steps


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