Got a girl's number for the first time...what should i text today?

Last night I was at a highlighter frat party and went up to this girl and wrote on her shirt, she wrote on mine, then I asked her to dance and we danced through a few songs (she was really into it - a hell of a dancer, which I told her [i think i wrote it on her shirt]). then she wrote her name on my shirt before she left to get a beer, and i told her to put her number on it too (isn't alcohol wonderful?). anyways now its the next day, were both college students, and i don't know what to text her (sad enough i've never gotten a number before - pathetic i know). i want to do something cleaver to stand out from every other guy, but i dunno. what should I say? should I even text her? i speak german and i'm pretty sure i remember something about her being part lituanian or something, and that she wrote the number in highlighter on my shirt. i'm not sure of anything real cleaver to say. thanks a million.