 Okay, so we're going to do a problem where we're just showing the high to pi star transition of these electrons in the ethylene molecule, okay? So we're looking at this carbon-carbon double bond because those are the electrons that in the high portion of that bond are going to be promoted with shining the light on them. So if you recall, right, a pi bond consists of four electrons, right? So we're going to fill them. Opposite spin in the lowest energy level, okay, so one, two, one, two, okay? So the pi electrons are here. What's going to happen is when we shine light on them, one of those is going to be promoted from the pi to the pi star energy level there, okay? And that's what's going to give you your absorption band in the UV region, okay? It's that promotion of that electron, okay? Are there any questions on that? I know it's pretty straightforward. I just wanted to. Yeah, sure. This is definitely, definitely a truncated version of what you would, you know, this is just showing you kind of a qualitative effect of what's going on when light shines, yeah. So the most energetically high electron is going to be the one that's promoted, is what I really want to indicate. And it's going to go from the pi to the pi star, okay? And again, I don't think she's going to test you a ton on this, but maybe this problem in particular, which is why I wanted to specifically record this. Any other questions? And I apologize for the, you know, not long-winded explanation. Yeah, it's fine. It's just when we did it with the bill and the pi star bill. Yeah, so what you're doing is you're making these bonds, you know? So you haven't made that carbon-carbon bond yet, you know? So what you're doing is showing the carbons individually, then showing them bonding, then. And we've already done all that, we're just showing the middle portion of that molecular orbital diagram. If you want to see some more molecular orbital diagrams, if you go to the webpage and just type in molecular orbital diagram, you can, I've done some of those, like with F2 minus and Li plus or Li2 plus and things like that, you know? The basic stuff, you know? But, okay, any other questions? Good question.