how to create checkpoint/multi use generator(how to set mob spawner)

Checkpoint

set redstone block (single use)
setblock ~ ~1 ~ minecraft:mob_spawner 0 replace {Delay:1,SpawnData:{EntityId:FallingSand,Pos:[293.0,57.0,-450.0],Tile:152,Time:6,TileID:152,DropItem:0,},EntityId:FallingSand,SpawnCount:1,SpawnRange:1,Delay:5,MinSpawnDelay:5,MaxSpawnDelay:5,MaxNearbyEntities:1,RequiredPlayerRange:2}


falling sand (multi use)
setblock ~ ~1 ~ minecraft:mob_spawner 0 replace {Delay:1,SpawnData:{EntityId:FallingSand,Pos:[293.5,57.0,-446.5],Tile:12,Time:50,TileID:12,DropItem:0,},EntityId:FallingSand,SpawnCount:1,SpawnRange:1,Delay:1,MinSpawnDelay:1,MaxSpawnDelay:1,MaxNearbyEntities:1,RequiredPlayerRange:2,SpawnPotentials:[{Type:FallingSand,Weight:0.5,Pos:[293.0,57.0,-450.0],Tile:152,Time:6,TileID:152,DropItem:0}]}


random generator
setblock ~ ~1 ~ minecraft:mob_spawner 0 replace {MinSpawnDelay:10,MaxSpawnDelay:10,SpawnCount:1,Delay:1,RequiredPlayerRange:100,MaxNearbyEntities:1,SpawnRange:1,EntityId:FallingSand,SpawnPotentials:[{Type:FallingSand,Properties:{Pos:[295.5,57.0,-450.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-451.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-452.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-453.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-454.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-456.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-457.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-458.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1},{Type:FallingSand,Properties:{Pos:[295.5,57.0,-459.5,],Tile:152,Time:50,DropItem:0,TileID:152,EntityId:FallingSand,},Weight:1}]}