bredmm

var usd_td = document.getElementById('get_usd'); 
colours = ['#eee', '#ccc', '#aaa',  '#999', '#777', '#444'];
setColour();
function setColour() {
    usd_td.style.color = colours.shift();
    console.log(colours)
    if (colours.length != 0) {
        setTimeout(setColour, 40)
    }
};