let q=180;
let pointS=15;
function setup() {
createCanvas(500,500);
background(100);
colorMode(HSB,360,100,100,);
}
function draw() {
stroke(q,190,90);
strokeWeight(pointS);
if(mouseIsPressed==true)
line(mouseX,mouseY,pmouseX,pmouseY);
if(keyIsPressed){
if((key=='w')){
pointS+=2;
}
else if(key=='q'){
pointS-=2;
}
}
if(keyIsPressed){
if((key=='a')){
q+=5;
}
else if(key=='s'){
q-=5;
}
}
}
<script src='https://cdn.jsdelivr.net/npm/p5@1.1.9/lib/p5.min.js'></script>