I think you forgot this "}"

Code:

ent_cycle("stand", my.skill21); // play stand frames animation
my.skill21 += 2 * time; // "stand" animation speed
if (my.skill21 > 100) {my.skill21 = 0;} // loop animation
}
wait (1);
} <------------------------------------------------------------------------------------------
while (my.skill22 < 80) // the enemy is dead
{
ent_cycle("death", my.skill22); // play death frames animation
my.skill22 += 1 * time; // "death" animation speed
wait (1);
}