Issue regarding scaling of sprite

[runeater]

I'm learning how to use javascript as well as pix.js to make simple games, however I am running into an issue while scaling buttons for my menu.

Below is what I am working with right now, button0 fails to show up only when I attempt to scale it button1 shows up just fine in the below code segment. Does anyone know why this may be occuring? 

var button0 = new PIXI.Sprite.fromImage("Assets/buttons/play.png");
	var button1 = new PIXI.Sprite.fromImage("Assets/buttons/highscores.png");
	var button2 = new PIXI.Sprite.fromImage("Assets/buttons/shop.png");
	var button3 = new PIXI.Sprite.fromImage("Assets/buttons/options.png");
	var button4 = new PIXI.Sprite.fromImage("Assets/buttons/exit.png");

button0.scale -= 0.5;
	button0.interactive = true;
	button0.on("mousedown", startPress);
	button0.position.set(50, 100);
	stage.addChild(button0);
	
	button1.interactive = true;
	button1.on("mousedown", highscoresPress);
	button1.position.set(50, 200);
	stage.addChild(button1);

 

[ivan.popelyshev]

Scale is a point.

//ok
button0.scale.x = 0.5; button0.scale.y = 0.5; 
//ok too
button0.scale.set(0.5);
//WRONG
button0.scale = 0.5;