<!DOCTYPE html>
<html lang="pt-br">
<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>Desenha barra</title>
</head>
<body>
<canvas width="600" height="400"></canvas>
<script>
function desenhaRetangulo(x, y, largura, altura, cor) {
var tela = document.querySelector('canvas');
var pincel = tela.getContext('2d');
pincel.fillStyle=cor;
pincel.fillRect(x,y, largura, altura);
pincel.strokeStyle='black';
pincel.strokeRect(x,y, largura, altura);
}
function desenhaTexto(x, y, texto) {
var tela = document.querySelector('canvas');
var pincel = tela.getContext('2d');
pincel.font='15px Georgia';
pincel.fillStyle='black';
pincel.fillText(texto, x, y);
}
var serie2015 = [50, 25, 20, 5];
var serie2016 = [65, 20, 13, 2];
var cores = ['blue', 'green', 'yellow', 'red'];
function desenhaBarra(x,y,serie,cores, ano){
desenhaTexto(x,y-10,ano)
for(var i = 0; i < cores.length; i++){
desenhaRetangulo(x,y,50,serie[i],cores[i])
y+=serie[i]
}
}
desenhaBarra(50, 50, serie2015, cores, '2015');
desenhaBarra(150, 50, serie2016, cores, '2016');
</script>
</body>
</html>
