summon armor_stand -306 -54 140 {NoGravity:1b,Silent:1b,Invulnerable:1b,Marker:1b,Invisible:1b,equipment:{head:{id:"minecraft:blue_banner",count:1}},Tags:["blueflag","flag"]}
summon armor_stand -330 -54 126 {NoGravity:1b,Silent:1b,Invulnerable:1b,Marker:1b,Invisible:1b,equipment:{head:{id:"minecraft:red_banner",count:1}},Tags:["redflag","flag"]}

fill -298 -50 153 -338 -60 113 air replace minecraft:gravel
fill -298 -50 153 -338 -38 113 air replace minecraft:gravel