===================================================================
--- original.js
+++ change.js
@@ -30,16 +30,30 @@
 	var enemyGraphics = self.attachAsset('obstacle', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	var enemyRowerGraphics = self.attachAsset('Enemy_Rower', {
+	self.enemyRowerFrame = 0;
+	self.enemyRowerGraphics = [];
+	self.enemyRowerGraphics.push(self.attachAsset('Enemy_Rower', {
 		anchorX: 0.5,
 		anchorY: 0.5
+	}));
+	self.enemyRowerGraphics.push(self.attachAsset('Enemy_Rower_1', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	}));
+	self.enemyRowerGraphics[1].visible = false;
+	self.enemyRowerGraphics.forEach(function (graphic) {
+		graphic.y = -graphic.height / 2 + 40;
 	});
-	enemyRowerGraphics.y = -enemyRowerGraphics.height / 2 + 40;
 	self.acceleration = 0;
 	self.move = function () {
 		self.acceleration += 0.1;
+		if (LK.ticks % 30 == 0) {
+			self.enemyRowerGraphics[self.enemyRowerFrame].visible = false;
+			self.enemyRowerFrame = (self.enemyRowerFrame + 1) % 2;
+			self.enemyRowerGraphics[self.enemyRowerFrame].visible = true;
+		}
 		if (self.spawnDirection === 'right') {
 			self.x -= enemySpeed + self.acceleration;
 		} else {
 			self.x += enemySpeed + self.acceleration;