Key and Key Spawner

Key Spawner
--------------------------
~create

arr_size = 10;
rrange = 9;
numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
            //number of keys
for (var i = 0; i < 3; i++) {
    spawn = irandom(rrange);
    switch(numbers[spawn]){
        case 0:
            instance_create_layer(304, 416, "keys", obj_key14);
            instance_create_layer(304, 416, "key_light", obj_key_light);
        break;
        case 1:
            instance_create_layer(335, 367, "keys", obj_key14);
            instance_create_layer(335, 367, "key_light", obj_key_light);
        break;
        case 2:
            instance_create_layer(335, 462, "keys", obj_key14);
            instance_create_layer(335, 462, "key_light", obj_key_light);
        break;
        case 3:
            instance_create_layer(271, 367, "keys", obj_key14);
            instance_create_layer(271, 367, "key_light", obj_key_light);
        break;
        case 4:
            instance_create_layer(271, 462, "keys", obj_key14);
            instance_create_layer(271, 461, "key_light", obj_key_light);
        break;
        case 5:
            instance_create_layer(271, 622, "keys", obj_key14);
            instance_create_layer(271, 622, "key_light", obj_key_light);
        break;
        case 6:
            instance_create_layer(271, 175, "keys", obj_key14);
            instance_create_layer(271, 175, "key_light", obj_key_light);
        break;
        case 7:
            instance_create_layer(334, 239, "keys", obj_key14);
            instance_create_layer(334, 239, "key_light", obj_key_light);
        break;
        case 8:
            instance_create_layer(334, 623, "keys", obj_key14);
            instance_create_layer(334, 623, "key_light", obj_key_light);
        break;
        case 9:
            instance_create_layer(464, 430, "keys", obj_key14);
            instance_create_layer(464, 430, "key_light", obj_key_light);
        break;
    }
    rrange--;
    arr_size--;
    array_delete(numbers, spawn, 1);
    array_resize(numbers, arr_size);

    image_xscale = 0.5;
    image_yscale = 0.5;
}


Actual Key
----------------
Create
image_xscale = 0.5;
image_yscale = 0.5;
timer = 0;
frequency = 0.1;
amplitude = 0.3;

Step
y = y + sin(timer*frequency)*amplitude;
timer++;

Collision with player
audio_sound_pitch(snd_close, 1.5);
audio_play_sound(snd_close, 8, false);
instance_destroy(self);

obj_player.keys++;