help with programming ATTINY13a

oh sorry I mean a led is connected to output 0 on the attiny.
actually i have tried different outputs on the attiny and the result i the same.

what could i possibly have done wrong if i am using the blink example sketch and upploading is not the problem?
i have a light from the led but no blink. that must indicate that i hav e chosen the right output in the sketch.