PROCESSING | NESTED POLYGONS

int polygons;
float angle;
int vertices;
float minRadius;
float maxRadius;
int n = 50;
int x;
float y = 5;
float noiseY;
color [] rainbow = {#DA00FC, #FF0DFC, #FFEB08,#D6FC00, #08F5FF};


void setup() {
  size(950, 600 );
  background(#FFFCFC);
  frameRate(10);
  smooth();
  polygons = 50;
  angle = 3;
  vertices = 5;
  minRadius = 20.0;
  maxRadius = 400.0;
}

void draw() {
  translate(width/2, height/2);
  for (int i = 0; i < polygons; i++) {
    rotate (PI*angle/180.0);
    drawPolygon(vertices, (float) minRadius + i*(maxRadius-minRadius)/polygons);
  }
}

void drawPolygon (int numVerts, float radius) {
  float vxorig = 0.0;
  float vyorig = 0.0;
  float vxa = 0.0;
  float vya = 0.0;
  float vxb= 0.0;
  float vyb = 0.0;

  vxorig = cos(0.0*TWO_PI)*radius;
  vyorig = sin(0.0*TWO_PI)*radius;


  for (int i = 0; i <(numVerts -1); i++) {

    vxa = cos((float)mouseX / numVerts*TWO_PI)*radius;
    vya = sin((float)mouseY / numVerts*TWO_PI)*radius;
    vxb = cos((float)(mouseX+1) / numVerts*TWO_PI)*radius;
    vyb = sin((float)(mouseY+1) / numVerts*TWO_PI)*radius;
    line(vxa, vya, vxb, vyb);
  }
 
 y += .02;
  
    noiseY = noise(y)* height ;
    stroke (rainbow[int(random(1,5))]);
  line(vxb, vyb, vxorig,vyorig);
}

Book reference :
Parametric Design for architecture