Gather these parts
Slot the sides into the back plates with glue as shown
Glue detail plate on with the top even with the top edge of the back plate
Glue the lower platform onto the previous steps slotting the pegs into the holes
Glue the top platform onto the previous steps slotting the pegs into the holes
Glue the support ribs into the slots from underneath so that the ribbed texture shows on top
You’re all done!
Prime with Rust-o-leum Profesional Enamel flat black and paint as normal with hobby paints.