class MonitorCounter implements Runnable {

private Counter counter;
private int pause; // in seconds

public MonitorCounter(Counter c, int t){
counter = c; pause = t;
}

public void run() {
for (int j = 0;j < 100;j = j + 1) {
Screen.writeInt(counter.value(),4);
try {
Thread.sleep(pause);
} catch(InterruptedException e) {return;}
}
}
}

Screen.writeInt(counter.value(),4);のところでエラーが出るの。ほかのクラスでも
同じような内容なんだけど同じところでエラーが・・・