5. y
x
z

7. float rot=0;
void setup(){
size(400,400);
colorMode(HSB,360,100,100,100);
frameRate(30);
smooth();
fill(200,100,100);
stroke(0,0,100);
rectMode(CENTER);
}
void draw(){
background(0,0,20);
translate(width/2,height/2);
rotate(rot);
rect(0,0,200,200);
rot += 0.1;
}

12. import processing.opengl.*;
float rot=0;
void setup(){
size(400,400,OPENGL);
colorMode(HSB,360,100,100,100);
frameRate(30);
fill(200,100,100);
stroke(0,0,100);
rectMode(CENTER);
}
void draw(){
background(0,0,20);
translate(width/2,height/2);
rotateX(rot);
rect(0,0,200,200);
rot += 0.1;
}

14. import processing.opengl.*;
float rotX=0, rotY=0, rotZ=0;
void setup(){
size(400,400,OPENGL);
colorMode(HSB,360,100,100,100);
frameRate(30);
fill(200,100,100);
stroke(0,0,100);
rectMode(CENTER);
}
void draw(){
background(0,0,20);
translate(width/2,height/2);
rotateX(rotX);
rotateY(rotY);
rotateZ(rotZ);
rect(0,0,200,200);
rotX += 0.1;
rotY += 0.2;
rotZ += 0.3;
}

19. import processing.opengl.*;
int NUM = 5000;
float[] x = new float[NUM];
float[] y = new float[NUM];
float[] z = new float[NUM];
color[] col = new color[NUM];
void setup(){
size(400,400,OPENGL);
colorMode(HSB,360,100,100,100);
frameRate(30);
noFill();
stroke(200,100,100);
smooth();
for(int i=0; i<NUM; i++){
x[i] = random(width);
y[i] = random(height);
z[i] = random(-5000,0);
col[i] = color(random(200,240),random(50,100),random(100));
}
}

20. void draw(){
background(0);
for(int i=0; i<NUM; i++){
stroke(color(col[i]));
line(x[i],y[i],z[i],x[i],y[i],z[i]+100);
z[i]+=20;
if(z[i]>100){
z[i] -= 5000;
}
}
}

22. import processing.opengl.*;
int NUM = 100;
float[] x = new float[NUM];
float[] y = new float[NUM];
float[] z = new float[NUM];
float[] rot = new float[NUM];
float[] rSpeed = new float[NUM];
color[] col = new color[NUM];
void setup(){
size(400,400,OPENGL);
colorMode(HSB,360,100,100,100);
frameRate(30);
noStroke();
smooth();
for(int i=0; i<NUM; i++){
x[i] = random(width);
y[i] = random(height);
z[i] = random(-5000,0);
rot[i] = 0;
rSpeed[i] = random(-0.1,0.1);
col[i] = color(random(0,360),random(100),random(100),50);
}
}

23. void draw(){
background(0);
for(int i=0; i<NUM; i++){
fill(color(col[i]));
pushMatrix();
translate(x[i],y[i],z[i]);
rotateX(rot[i]);
rotateY(rot[i]);
rotateZ(rot[i]);
box(30);
popMatrix();
z[i]+=20;
rot[i] += rSpeed[i];
if(z[i]>100){
z[i] -= 5000;
}
}
}

25. import processing.opengl.*;
float a;
int NUM = 128;
float offset = PI/NUM;
color[] colors = new color[NUM];
void setup()
{
size(400, 400, OPENGL);
noStroke();
colorMode(HSB,360,100,100,100);
frameRate(30);
for(int i=0; i<NUM; i++) {
colors[i] = color(i*2+100,70,100,25);
}
lights();
}

26. void draw()
{
background(0);
lights();
translate(width/2, height/2, -20);
a+=0.01;
for(int i=0; i<NUM; i++) {
pushMatrix();
fill(colors[i]);
rotateY(a+offset*i);
rotateX(a/2+offset*i);
rotateZ(a/3+offset*i);
box(width/2);
popMatrix();
}
}