Draw pixels in PNG easy.
npm install png-pixel --save
const PNGPixel = require('png-pixel');
PNGPixel.add('input.png', 'output.png', [
{x: 0, y: 0, color: '24B3E3'},
{x: 1, y: 1, color: 'E32437'},
]);
Note: Input file need to be already exist before adding pixels.