Happy 4th of July! God bless America!

Bachuslib is right, you'd need image sources on the platform. It's pretty easy to do, simply copy the link to the website you got the images from and then paste it in the smaller bracket of this markdown code.
[write 'image source' here](paste weblink here)

Notice how the brackets are close to each other without spacing?
My friend Kat did a very explanatry post on this: Markdown guide

Remember, the images have to be free from copyright. you can find them on pixabay.com, pexels.com and the likes.

Need help? you can reach steemSTEM on discord here: https://discord.gg/Eu8JjW