I used my Set C templates for the tiles that I'm going to paint.
I used markers to draw and outline the templates so it will be easier for me to paint later. All of these approximately took me around 2 hrs just to outline it.
And I decided to use poster colour to paint the tiles. I wanted to use acrylic, because the acrylic colour will definitely stay on the tiles, but unfortunately, I do not have them, so I will have to make use of the poster colour. Here are the colours that I use:-

Blue

Reddish brown

Dark Green

Golden brown
As you can see from the tube, it says fine colour, not poster colour. Fine colour is a new product, an improved version of poster colour (this is what it says on the cover)

And because the paint will come off eventually, I sprayed the tiles with this acrylic spray, which cost me about $16 (very expensive). This will protect the paint and the tiles, and give a smooth glossy finish to it.
This is my finished product:-
There are some parts where the colour was chipped and peeled. This was due to my sibling touching the tile before the acrylic had dried off. I couldn't paint it over, as the acrylic has already covered the tiles.