refactor: Basic timer function

objects/obj_timer/Create_0.gml

@@ -0,0 +1,4 @@
+time_set = 0;
+time_passed = 0;
+end_function = undefined;
+end_function_args = [];

objects/obj_timer/Step_0.gml

@@ -0,0 +1,15 @@
+if (time_set > 0) {
+    if (time_passed < time_set) {
+        time_passed++;
+        show_debug_message(time_passed);
+    } else {
+        if (is_method(end_function)) {
+            show_debug_message("Executing Method!");
+            method_call(end_function, end_function_args);
+        }
+        show_debug_message("Killing Myself!");
+        instance_destroy(self);
+    }
+} else {
+    instance_destroy(self);
+}

scripts/scr_wait_and_execute/scr_wait_and_execute.gml

@@ -0,0 +1,13 @@
+/// @mixin
+/// @desc Waits for a set amount of steps and executes a function/codeblock.
+/// @arg {real} timer In steps, will be multiplied by (room speed / 30).
+/// @arg {function} func
+/// @arg {array} func_args
+function wait_and_execute(timer, func, func_args = []) {
+    var _timer_obj = instance_create(0, 0, obj_timer);
+    with(_timer_obj){
+        time_set = timer * (room_speed / 30);
+        end_function = func;
+        end_function_args = func_args;
+    }
+}