Linking Components For Icon To Appear Via Click

Hi there

Summary: I’d like an icon to appear on the 7th box of this calendar.

I’m creating an overarching calendar where the colour changes when you hover over the box (light green) and when you click on it, it becomes a dark green colour.

How do I link the 6th and 7th boxes via a click component rule where the icon appears on the 7th box?

Apologies for my noobness - I’m an illustrator user and wrapping my head around Figma (p.s. it’s amazing :star_struck:).