colorized shapes - OpenProcessing

mySketch
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var points = [];
let R = 0;
let G = 0;
let B = 0;
var currentColor = 0;
​
function setup() {
  createCanvas(windowWidth, windowHeight);
  background(255);
  colorMode(RGB);
  var currentColor = [R,G,B];
}
​
​
//draw line of shape and save vector points
function draw() { 
  
  if (mouseIsPressed) {
    
  var fast = dist(pmouseX,pmouseY,mouseX,mouseY);
​
fast = constrain(fast,0,10);
  strokeWeight (fast/2);
  
    line(pmouseX,pmouseY,mouseX,mouseY);
      
    //draw a line
    
    //create a vector for the current coordinates
    var p = createVector(mouseX, mouseY);
    
    //add it at the end of the points array
    points.push(p);
  }
}
​
//if mouse is double clicked, erase 
function doubleClicked() {
 {
    background(255);
    }
}
​
function keyPressed() {
  
  //when keys r,g,and b are pressed, add '5' to values R, G, and B respectively
  if (key=="r"){
  R = (R + 5);
  }
  
  //faster key to add to R value
  if (key == "1"){
    R = (R + 10);
  }
​
  if (key == "g"){
  G = (G + 5);
  }
  
  //faster key to add to G value
  if (key == "2"){
    G = (G+ 10);
  }
  
  if (key == "b"){
  B = (B + 5);
  }
​
  //faster key to add to B value
  if (key == "3"){
    B = (B + 10);
  }
​
  //reset all color values when 0 is pressed
  if (key == 0){
    R = (0);
    G = (0);
    B = (0);
  }
​
  
  //if the colors max out past 255, reset to 0
  if (R > 255){
    R = (R-255);
  }
  
    if (G > 255){
    G = (G-255);
  }
  
    if (B > 255){
    B = (B-255);
  }
  
  let currentColor = [R,G,B];
  
    
  if (key == "p");{
    print(currentColor);
  }
​
//just creates shape to fill
  beginShape();
  
  //go through all points drawn
  for (var i = 0; i < points.length; i++) {
    thisPoint = points[i];
    vertex(thisPoint.x, thisPoint.y);
    
    //shape is not filled unless 'f' is pressed
      if (key == "f"){
  fill(currentColor);
      }
        else {
          noFill();
        }
  }
​
endShape();
​
//delete all the saved points
points = [];
​
}
​
//refereneces: cycle through colors, arrays and saving vector points