Plot.plot({
grid: true,
marks: [Plot.frame(), Plot.dot(data, {x: "x", y: "y", fill: "c", r: "s", opacity: .7})],
x: {domain: [-30, 30], ticks: d3.range(-30, 30, 5)},
y: {domain: [-30, 30], ticks: d3.range(-30, 30, 5)},
color: {scheme: "Turbo", domain: [20, 80]},
r: {range: [2, 16], domain: [20, 80]},
height: 500,
width: 900,
title: 'Random Data'
})