How I can create a rectangle with Java Script

Question

I am trying to create a rectangle using Javascript, avoiding using the functions of the canvas as moveto and drawto. However my rectangle does not look good. Follows the code:

function retangulo(x1, y1, x2, y2){
            let horizontalx = x2 - x1;
            let verticaly = y2 - y1;
            linhaVertical(x1, y1, verticaly);
            linhaHorizontal(x1, y1, horizontalx);
            linhaVertical(x2, y2, verticaly);
            linhaHorizontal(x2, y2, horizontalx);

        }
function linhaVertical(x,y, size) {
            for(let i=0; i < size; i++) {
                acender(x, y + i);
            }
        }
function linhaHorizontal(x,y, size) {
            for(let i=0; i < size; i++) {
                acender(x + i, y);
            }
        }
function acender(x, y) {
            let index = (x + y * width) * 4;
            imageData.data[ index ] = 0;
            imageData.data[ index + 1] = 0;
            imageData.data [ index + 2] =0;
            imageData.data[ index + 3 ] = 255;
        }

Thank you for your attention in advance