1 brick glows -> next brick glows, old brick is off (not glowing -> 1 brick glows -> next brick glows, old brick is off (not glowing -> 1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing ->1 brick glows -> next brick glows, old brick is off (not glowing
over and over with a on and off brick