Library doesn’t seem to be initilized for me to declare global variables

I am using the p5.js and the matter.js libraries. The following code produces a [B]ReferenceError[/B] saying that [B]Matter[/B] wasn’t defined on [B]line 4[/B]

[CODE]let width = 900;
let height = 600;

var Engine = Matter.Engine,
World = Matter.World,
Bodies = Matter.Bodies;
var engine = Engine.create();
var world = engine.world;

function setup(){
createCanvas(width,height);
car = new Car(100,height/2);
}[/CODE]

When the variables are declared within the setup function, everything worls fine, except I am not able to access the variables in my [B]car [/B]object

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