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Please resteem.

I have finished resteem

You say in your entry post that your work took 4 hours. You are asked to take no more than 15 minutes for Artstorm so I cannot accept your entry. Perhaps you can use it for another contest.

I think everyone who participated in the graffiti contest you developed will not be able to finish within 15 minutes. impossible.
but it's okay. thanks.

Many entrants have posted a video with a stopwatch to prove they only took 15 minutes.