async function drawBars() {
const svg = d3.select("#chart")
.append("svg")
.attr("width", dimensions.width + dimensions.margin.left + dimensions.margin.right)
.attr("height", dimensions.height + dimensions.margin.top + dimensions.margin.bottom)
.append("g")
.attr("transform",
"translate(" + dimensions.margin.left + "," + dimensions.margin.top + ")")
svg.append("g")
.selectAll("g")
.data(stackedData)
.enter().append("g")
.attr("fill", d => color(d.key))
.selectAll("rect")
.data(d => d)
.enter().append("rect")
.attr("x", d => x(d.data.group))
.attr("y", d => y(d[1]))
.attr("height", d => y(d[0]) - y(d[1]))
.attr("width",x.bandwidth())
svg.append("g")
.attr("transform", "translate(0," + dimensions.height + ")")
.call(d3.axisBottom(x).tickSizeOuter(0));
svg.append("g")
.call(d3.axisLeft(y));
}