<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>FLOR</title>
</head>
<body>
    <canvas width="600" height="400">
    </canvas>
</body>
<script>
    const pantalla = document.querySelector('canvas');
    const pincel =  pantalla.getContext('2d');
    const cuadrado  = (x,y,ancho,alto,color,borde) => {
        pincel.fillStyle = color;
        pincel.fillRect(x,y,ancho,alto);
        pincel.strokeStyle = borde;
        pincel.strokeRect(x,y,ancho,alto)
    }
    cuadrado(0,0,600,400,"lightgray");
    const escribirTexto = (x , y, texto)=> {
        var pantalla = document.querySelector("canvas");
        var pincel = pantalla.getContext("2d");
        pincel.font="15px Georgia";
        pincel.fillStyle="black";
        pincel.fillText(texto, x, y);    
    }
    const dibujarBarra = (x, y, serie, colores, texto) => {
        escribirTexto(x, y - 10, texto);
        var sumaAltura = 0;
        for (var i = 0; i < serie.length; i++) {
            var altura = serie[i];
            cuadrado(x, y + sumaAltura, 50, altura, colores[i]);
            sumaAltura = sumaAltura + altura;
        }
    }
    let serie2009 = [6, 47, 41, 3, 3];
    let serie2019 = [81, 9, 3, 3, 4];
    let colores = ["blue","green","yellow", "red","gray"];
    dibujarBarra(50, 50, serie2009, colores, "2009");
    dibujarBarra(150, 50, serie2019, colores, "2019");
</script>
</html>