Waiting Room (watercolour ink)

Trying to learn how to do these large flat color spaces in watercolours (well, watercolour-ink actually).

I got shown a "magic gum" that's supposed to remove watercolours, but i just left a big unremovable spot on the lower right side ... the more you learn!

It's all done using the "boring" orthogonal perspective (same size everywhere, lines are parallel, no vanishing point) because waiting is kind of boring I guess!