Code:
public plugin_init() {
register_plugin("abc", "0.1", "abc")
set_task(12.0, "do_health", 0, "", 0, "b")
}
public do_health() {
new players[32], count
get_players(players, count)
for (new i = 0; i < count; i++) {
set_user_health(players[i], get_user_health(players[i]) - 1)
}
}