Processing代码调试：Tunnel类显示问题

[mw_shl_code=java,true]Tunnel oursGame = new Tunnel(0.1);

//float a;
float x, y;
int depth;

void setup() {

  size(1200, 800, P3D);
}

void draw() {
  background(0);
  translate(width/2.0, height/2.0-100, 0);

  pushMatrix();
translate(0, 200 ,300);
lights();
noStroke();
fill(#E3C26E);

box(50);
popMatrix();

oursGame.display();
oursGame.speedMove();


  float anger = atan2(mouseY-100,mouseX-100);
  rotate(anger);

  rotate(x);
  if ((keyPressed)&&(key == 'a')) {
x+=0.1;
  }
  if ((keyPressed)&&(key == 'd')) {
x-=0.1;
  }
translate(0, 0, -80);
}


  class Tunnel{

  // default values for a Tunnel
color colour = color(0, 255, 0);
//int tunnelNumber= 1;
float speed;
float c;
int i;

// array of blocks in the tunnel
Block[] blocks = new Block[100];

//constructor
Tunnel (float tempspeed) {
speed = tempspeed;
blocks = new Block(0);
  }

   //method
  void display(){
   for (int i =blocks.length-1;i > 0; i--) {
   blocks = blocks[i-1];
   }
   blocks[0] = blocks[blocks.length-1];
}//constructor

  void speedMove()
  {
translate(0,100, c);
c+=speed;
  }

}//tunnel

//====================================================
class Block {

//default values for 4 blocks
  float x ;
  float y ;
  float z ;

  float angle ;
  float roadlocation;
  float len;


  //  float tempspeed
  Block(float tempZ ) {
angle = (float)random(0, 2*PI);
len = random(10,200);
//speed = tempspeed;
z = tempZ;

//set random  the angle of the block  seconda il centro
if ( (( 0<=angle)&&(angle<PI/2)||(PI<=angle)&&(angle<3/2*PI))) {
   x = -100*sin(angle);
   y = +100*cos(angle);
}
if ((( PI/2<=angle)&&(angle<PI)||(3/2*PI<=angle)&&(angle<2*PI))) {
   x = +100*sin(angle);
   y = -100*cos(angle);
}
  }




  //set the random rotate
  void display() {

noStroke();
pointLight( 255, 200, 0, width / 2, height / 2, 400 );
directionalLight(0, 255, 255, 0, -1, 0);
println(roadlocation);

if ((0<= angle)&&(angle<PI)) {
   rotate(PI/2-angle);
}
if ((PI <= angle)&&(angle<2*PI)) {
   rotate(PI/2+angle);
}

//4 blocks in a plane
for (int i =0; i<4; i++) {
   pushMatrix();
   translate(x, y, 0);
   fill(200, 122, 255);
   box(30,30,len);
   popMatrix();
}
}
}[/mw_shl_code]

问题代码, processing

各位前辈好我是刚学processing的菜鸟下面这行代码显示不了....

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