Frog.js

function Frog(name) {
  this.name = name
}

Frog.prototype.getTeeths = function() {
  return 2
}

Frog.prototype.lick = function(target) {
  console.log(`I'm going lick you, ${target.name}. You better taste delicious`)
}

// Or with classes

class Frog {
  constructor(name) {
    this.name = name
  }

  getTeeths() {
    return 2
  }

  lick(target) {
    console.log(
      `I'm going lick you, ${target.name}. You better taste delicious`,
    )
  }
}