Builder: Mission has started .

Builder: Hi again !

Architect: hi !

Architect: First build three blue blocks in a line on the ground

Builder: place blue 0 1 -2, place blue 0 1 -3, place blue 0 1 -4

Architect: Great !

Architect: Now three red blocks parallel to the blue blocks ,

Architect: touching the blue blocks

Builder: place red -1 1 -4, place red -1 1 -3, place red -1 1 -2

Architect: Nice .

Architect: Now three more red blocks on top of the existing red blocks

Builder: pick red -1 1 -2, place red -1 1 -2, place red -1 2 -2, place red -1 2 -3, place red -1 2 -4

Architect: Perfect .

Architect: Now three layers of three purple blocks next to the red blocks .

Architect: Like we are building a staircase .

Builder: place purple -2 1 -2, place purple -2 1 -3, place purple -2 1 -4, place purple -2 2 -4, place purple -2 2 -3, place purple -2 2 -2, place purple -2 3 -2, place purple -2 3 -3, place purple -2 3 -4

Architect: Perfect ,

Architect: that's it ,

Architect: we're done !