ReferenceError: loadAnimation is not defined at /sketch.js:6:3

var boat,groundImage; //variables declared

function preload(){
 
  boat = loadAnimation("b2.png"); //loading animation
  groundImage = loadImage("b1.jpg");
  
  
}

function setup() {
  createCanvas(600, 400); //draw canvas
}

function draw() 
{
 background(180);
image(groundImage,0,0);
animation(boat,0,0); //locate animation
}

here is a simple code for using animation in p5.js editor. But I got an error as: ReferenceError: loadAnimation is not defined at /sketch.js:6:3