Sadly art is not my forte, but I do have an entry for your cocktail contest from my time in the Navy. Not the most ‘obscure’ one as pretty much every bar seemed to know what it was, but damn if I don’t miss it up in Providence some times;
pour over crushed ice,
1 shot of white/clear rum,
1 shot of tequila,
1 shot of gin,
1 shot of vodka,
Then stir the mixture and add a shot of blueberry liquor, and a mixture of lime, strawberry and pineapple juice.
After this, fill the glass with a carbonated lemonade and serve.
The thing is luminous blue, tastes deliciously sweet, and will put you out for the night if you’re not careful.