Hi, today I noticed something yellow on the concrete part of my window, it looked very disgusting and to be honest, kind of creepy. Like a alien nest or something :-D

I knocked it down with a stick and it fell onto the grass below my window. It was raining so after it stopped raining I went outside and took a photo of it, so this is a photo of it wet. Not sure what it looks like when it's dry.

About 2 hours later I looked through my window and could not see it anywhere. (it was raining terribly during those 2 hours so I wonder if it melted?? or something).
Now I'm creeped out and don't wanna open my window.

Can someone PLEASE help me identify what it is???