async function animateWrapper() {
        for (let i = 0; i < lines.length; i++) {
            let line = lines[i];

            console.log(i)
            if(i==80){
                //alert("Success")
                $("div.success").fadeIn( 300 ).delay( 1500 ).fadeOut( 400 );
                const pStandby = line.node().getPointAtLength(line.node().getTotalLength());
                g.append("circle").attr("cx", pStandby.x).attr("cy", pStandby.y).attr("r", 5).style("fill", "red").style("opacity", "1");
                await sleep(3000);
            }

            function tweenDash() {
                return function (t) {
                    const l = line.node().getTotalLength();
                    const interpolate = d3.interpolateString("0," + l, l + "," + l);
                    const marker = d3.select("#marker");
                    marker.style("fill", line.attr('marker-color'));
                    const p = line.node().getPointAtLength(t * l);
                    marker.attr("transform", "translate(" + p.x + "," + p.y + ")"); //move marker
                    //console.log(t)
                    return interpolate(t);
                }
            }

            await animate(line, tweenDash);
        }
    }

$("div.success").fadeIn( 300 ).delay( 1500 ).fadeOut( 400 );

<div class="alert-box success">Successful Alert !!!</div>