Photo by Rod Mar, courtesy the Space Needle.

Calling all art geeks: here’s your chance to get your design on top of the Space Needle.

Now through Sept. 20, the Space Needle is accepting design submissions for its “Top Off Our 50th” campaign. The new design will be painted atop the famous needle’s roof on Oct. 21, the anniversary of the closing day of the 1962 World’s Fair, and will stay there for the next six months, until its 51st birthday on April 21, 2013.

You might not have noticed unless you were flying by in a plane, but the Space Needle is promoting the contest on Twitter with the hashtag #topthis, printed in giant letters on the landmark’s lid.

Once submissions close, a panel of local judges will select the top five designs that will be featured on the campaign’s site and Facebook for a public vote. The most popular design creator will win rights to put their mark on top of the Needle. The winner will also receive all sorts of other nifty prizes associated with the Space Needle’s 50th anniversary.

The Space Needle, built for the 1962 World’s Fair, is the No. 1 attraction in the Pacific Northwest, bringing over a million visitors every year.

Got an inkling to submit? Go to spaceneedle.com/topthis.html to download a template and to submit your design.

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