[Deviance]

public lifecard(id) {
    new name[32]
    get_user_name(id, name, 31)
    set_hudmessage(0, 0, 255, 0.0, 0.3, 0, 6.0, 12.0)
    show_hudmessage(id, "%s is given 3 hp every second!")
    
    new health = get_user_health(id)
    set_user_health(id, health+3)
    set_task(1.0, "lifecard", id)
    return PLUGIN_CONTINUE
}

->

public give_life(id) {
    new health = get_user_health(id)
    set_user_health(id, health+3)
    set_task(3.0, "give_life", id)
}

public lifecard(id) {
    new name[32]
    get_user_name(id, name, 31)
    set_hudmessage(0, 0, 255, 0.0, 0.3, 0, 6.0, 12.0, 0.1, 0.2, -1)
    show_hudmessage(id, "%s is given 3 hp every second!", name)

    give_life(id)
    return PLUGIN_CONTINUE
}