Roblox Script Generated by ScripterAI

"spread the spawnedNPCs evenly across the available spawns"

-- roblox script 
local wave = 1
local maxWaves = 25
local spawns = {game.Workspace.NPCSpawn1, game.Workspace.NPCSpawn2, game.Workspace.NPCSpawn3}
local npcs = game.ReplicatedStorage.NPCs:GetChildren()

while wave <= maxWaves do
    local spawnCount
    if wave == 1 then
        spawnCount = 5
    elseif wave < 4 then
        spawnCount = math.floor(5 * (1.25^(wave - 1)))
    else
        spawnCount = math.floor(5 * (1.5^(wave - 1)))
    end
    
    local spawnedNPCs = {}
    for i = 1, spawnCount do
        local npc = npcs[math.random(#npcs)]:Clone()
        local spawn = spawns[(i - 1) % #spawns + 1]
        npc.Parent = game.Workspace
        npc.HumanoidRootPart.CFrame = spawn.CFrame
        table.insert(spawnedNPCs, npc)
    end
    
    -- wait until all NPCs have died before starting next wave
    while #spawnedNPCs > 0 do
        for i, npc in ipairs(spawnedNPCs) do
            if npc.Humanoid.Health <= 0 then
                table.remove(spawnedNPCs, i)
            end
        end
        task.wait(1)
    end
    
    wave = wave + 1
end