Script help

[Rakez68]

Sigh, I can't figure this out.
This is so complicated!
I'm starting to feel embarrassed to bother you guys for so long. People must appreciate alot that you spend so much time with people that are bad at scripting like I am.

Honestly, I have no idea what you meant in your latest post. I don't understand English very well, I'm finnish.

EDIT:

HOORAY IT WORKS!

void OnStart()
{
SetLocalVarInt("Var1", 0);
for(int i=1;i<=4;i++) AddUseItemCallback("Chemicals", "Chem"+i, "GetAcidComplete", "UsedChemsOnPot", true);
}
void UsedChemsOnPot(string &in asItem, string &in asEntity)
{

if (asItem == "Chem1")
{
AddLocalVarInt("Var1", 1);
RemoveItem("Chem1");
PlaySoundAtEntity("", "unlock_door.snt", "Player", 0, false);
}
else if (asItem == "Chem2")
{
AddLocalVarInt("Var1", 1);
RemoveItem("Chem2");
PlaySoundAtEntity("", "unlock_door.snt", "Player", 0, false);
}
else if (asItem == "Chem3")
{
AddLocalVarInt("Var1", 1);
RemoveItem("Chem3");
PlaySoundAtEntity("", "unlock_door.snt", "Player", 0, false);
}
else if (asItem == "Chem4")
{
AddLocalVarInt("Var1", 1);
RemoveItem("Chem4");
PlaySoundAtEntity("", "unlock_door.snt", "Player", 0, false);
}

if(GetLocalVarInt("Var1") == 4)
{
GiveSanityBoostSmall();
SetEntityActive("GetAcidComplete", false);
SetEntityActive("chemical_container_full_1", true);
PlayMusic("26_event_agrippa_head.ogg", false, 0.7, 0.1, 10, false);
}
}

Thank you so much for helping me out guys!