
cls();
var x;
var flag;
x = 10;
flag = 0;
while(1){
if(flag == 0){
lc(x, 11);
log("o");
x = x + 1;
if(x == 20){
flag = 1;
x = x - 1;
}
}
else{
lc(x, 11);
log("x");
x = x - 1;
if(x == 9){
flag = 0;
x = x + 1;
}
}
sleep(100);
}