The Brown Light erdos Engine block powered by light

Every survivor lifts to exactly three residues n, n+2·3ᵏ, n+4·3ᵏ — three cylinders, coloured R G B. Because 2^(2·3ᵏ) ≡ 1 + c·3^(k+1) with c coprime to 3, the digit steps 0→1→2 across them and exactly one burns. That is one throw. Stack the throws and you have the block. The fuel is the light.