import javax.microedition.lcdui.*;


public class canv extends Canvas implements Runnable{
public int screenw,screenh,i,speed,nap;
public static int screenl,n;
public int botX[],botY[],botS[];
public boolean firstRun=true;
public boolean fire=false;



 /**
 * constructor
 */
 public canv() {
screenw=getWidth();
screenh=getHeight();
if(screenh<screenw) screenl=screenw;
if(screenh>screenw) screenl=screenh;
speed=1;
nap=1;
i=1;
 }
 public void paint(Graphics g) {
if(firstRun!=false){
first();
}
g.setColor(200,0,200);
g.drawString(""+Integer.toString(botX[0]),0,0,1);
g.setColor(0,0,0);
g.fillRect(0,0,screenw+1,screenh+1);
g.setColor(0,200,210);
g.fillRect(botX[0],botY[0],17,17);
g.setColor(0,200,0);
for(i=1;i<4;i++){
g.fillRect(botX[i],botX[i],20,20);
botai();
}
}

 }
 public void start(){
Thread t=new Thread(this);
t.start();
}

public void run()
{
repaint();
try { Thread.sleep(20);
}
catch(Exception ex){
}
}
public void first(){
firstRun=false;
botX[0]=screenw/2;
botY[0]=screenh/2;
while(i<4){
botS[i]=0;
botint();
i++;
 }
 }
 /**
 * Called when a key is pressed.
 */
 protected  void keyPressed(int keyCode) {
if(keyCode==KEY_NUM5) repaint();
 }
public void botint(){
if(i>0&&i<4){
botS[i]=1;
n=rnd.intscpart();
switch(n){
case 1:
botX[i]=-25;
botY[i]=rnd.intsc(screenl);
break;
case 2:
botY[i]=screenw+25;
botX[i]=rnd.intsc(screenl);
break;
case 3:
botX[i]=screenh+25;
botY[i]=rnd.intsc(screenl);
break;
case 4:
botY[i]=-25;
botX[i]=rnd.intsc(screenl);
break;
}
}
}
public void botai() {
if(botX[i]>botX[0]&&botX[i]<botX[0]+17){
if(botS[i]==2)botX[i]+=speed;
if(fire!=false&&nap==1&&botY[i]<botY[0]) botS[i]=0;
if(fire!=false&&nap==3&&botY[i]>botY[0]) botS[i]=0;
}
if(botX[i]<botX[0]&&botX[i]+20>botX[0]){
if(botS[i]==2)botX[i]-=speed;
if(fire!=false&&nap==3&&botY[i]>botY[0]) botS[i]=0;
if(fire!=false&&nap==1&&botY[i]<botY[0]) botS[i]=0;
}
if(botY[i]<botY[0]&&botY[i]+20>botY[0]){
if(botS[i]==2)botY[i]-=speed;
if(fire!=false&&nap==4&&botX[i]>botX[0]) botS[i]=0;
if(fire!=false&&nap==2&&botX[i]<botX[0]) botS[i]=0;
}
if(botY[i]>botY[0]&&botY[i]+20<botY[0]){
if(botS[i]==2)botY[i]+=speed;
if(fire!=false&&nap==4&&botX[i]>botX[0]) botS[i]=0;
if(fire!=false&&nap==2&&botX[i]<botX[0]) botS[i]=0;
}

if(botS[i]==1&&botX[i]-botX[0]<0) botX[i]+=speed;
if(botS[i]==1&&botX[i]-botX[0]>0) botX[i]-=speed;
if(botS[i]==1&&botY[i]-botY[0]<0) botY[i]+=speed;
if(botS[i]==1&&botY[i]-botY[0]>0) botY[i]-=speed;
if(botS[i]==0) botint();
}
}