Add mechanics for powerups with a duration

constants.js

@@ -1067,5 +1067,16 @@ const powerups = {
       clickPopup("CAR!", "gulp", [e.clientX, e.clientY]);
       clickPopup("+1 car", "food", [e.clientX, e.clientY]);
     }
+  },
+  "nothing": {
+    name: "Nothing",
+    description: "Does nothing for 10 seconds",
+    icon: "fa-car",
+    duration: 10000,
+    effect: state => state.belongings.car.count += 1,
+    popup: (self, e) => {
+      clickPopup("CAR!", "gulp", [e.clientX, e.clientY]);
+      clickPopup("+1 car", "food", [e.clientX, e.clientY]);
+    }
   }
 }

gorge.js

@@ -19,6 +19,23 @@ let clickVictim = "micro";
 
 let lastTime = 0;
 
+const activePowerups = [];
+
+function tickPowerups(delta) {
+  // I love mutating arrays as I traverse them.
+  for (let i = activePowerups.length-1; i >= 0; i--) {
+    activePowerups[i].lifetime -= delta;
+    if (activePowerups[i].lifetime <= 0) {
+      clickPopup("OOF", "info", [500, 500]);
+      activePowerups.splice(i, 1);
+    }
+  }
+}
+
+function addPowerup(powerup) {
+  activePowerups.push({powerup: powerup, lifetime: powerup.duration});
+}
+
 function applyGlobalProdBonuses(productivity) {
   for (let effect of effects["prod-all"]) {
 
@@ -109,6 +126,7 @@ function updateDisplay() {
   displayResources();
   displayBuildings();
   displayUpgrades(showOwnedUpgrades);
+  tickPowerups(delta);
 
   setTimeout(updateDisplay, 1000/updateRate);
 }