/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/kill @e/execute @a ~ ~ ~setblock ~ ~-1~ice/execute @a ~ ~ ~setblock ~ ~-1~ice/summon lightning_bolt/execute @a ~ ~ ~setblock ~ ~-1~ice/execute @a ~ ~ ~setblock ~ ~-1~ice/execute @a ~ ~ ~setblock ~ ~-1~ice/execute @a ~ ~ ~setblock ~ ~-1~ice