[gecko]egg: which way is up?

[oyarsa]

My apologies. I am only asking this silly question because it is sort of urgent. An egg rolled in my incubator and the mark that was "up" is no longer up. It has been 4 days since the egg was laid. I examined the egg and saw the normal ring of vessels around the perimeter and a strange red "blob" at the top of the egg. This "blob" has a little heart that I can see beating. Is this "blob" (i.e.: embryo) supposed to be on the top of the egg or on the bottom of the egg? Please help me. Instinct tells me the embryo should be at the bottom but something doesn't seem right.   This is a spider gecko egg if that's important.   Thanks, Mike