your positions are wrong
local monster_pos = {
[1] = {pos = {195, 118, 10}, monster = "Demon"},
[2] = {pos = {196, 118, 10}, monster = "Demon"},
[3] = {pos = {194, 120, 10}, monster = "Demon"},
[4] = {pos = {192, 120, 10}, monster = "Demon"},
[5] = {pos...