Implemented basic buying functions

- Renamed more scripts
- Switched license to Artistic 2.0

scripts/Zone.gd

@@ -1,5 +1,8 @@
 extends KinematicBody2D
 
+signal grabbed
+signal power
+
 export var cost: int = 10000
 export var income: int
 export var expense: int
@@ -9,38 +12,52 @@ onready var quarters = $Quarters
 onready var player = $AnimationPlayer
 
 var can_grab = false
+var is_powered = false
 var grabbed_offset = Vector2()
 
 func _ready():
 	SimEvents.connect("pay_expense", self, "_get_expense")
-	
-	# Once placed in-world, it'll substract from your budget
-	if SimData.budget >= cost:
-		SimData.budget -= cost
+	connect("grabbed", self, "_grab_zone")
+	connect("power", self, "_power_zone")
 
 func _input(event):
-	if event is InputEventMouseButton:
-		can_grab = event.pressed
+	if event is InputEventMouseButton and can_grab:
+		# Disable grabbing
+		can_grab = false
 		grabbed_offset = position - get_global_mouse_position()
-
-func _process(delta):
-	
-	player.play("Animante")
-	
-	if SimData.budget >= expense:
-		SimData.budget -= expense
 		
-	if SimData.budget >= income:
-		SimData.budget += income
-	
-	if Input.is_mouse_button_pressed(BUTTON_LEFT) and can_grab:
+		# Substract from the player's budget
+		if SimData.budget >= cost:
+			SimData.budget -= cost
+
+func _process(delta):	
+	if can_grab:
 		position = get_global_mouse_position() + grabbed_offset
+	
+	if not is_powered:
+		quarters.stop()
+	else:
+		quarters.start()
+	
+func _grab_zone():
+	can_grab = true
+	
+func _power_zone():
+	quarters.start()
+	player.play("Animante")
 
 func _on_Quarters_timeout():
 	if SimData.prev_quarter == 4:
+		if SimData.budget >= expense:
+			SimData.budget -= expense
+		
+		if SimData.budget >= income:
+			SimData.budget += income
+		
 		SimData.year += 1
 		SimData.emit_signal("one_time_zone")
 		SimData.emit_signal("pay_expense")
 		
-	SimData.prev_quarter = SimData.quarter
+		SimData.prev_quarter = SimData.quarter
+		
 	quarters.start()