As Paul says, it's Home Assistant. We see a lot of HA queries here but few answers because most people don't use HA.
No doubt it is a very good operating system but I have not discovered what it offers over and above Node-red.
Here's how I would achieve what you describe just in Node-red.
White 5s, Red 5s, Green 5s, Blue 5s and repeat until told to stop.
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