Points

// Temporary variables
var Points, Multiplier;

// Get points
Points = round(get_integer("A treasure box has been picked up!##How many points would you like to add?", -1));
while(1)
{
    Points = round(get_integer("How many points would you like to add?", -1));
    if(Points <= 0)
    {
        show_message("You must enter some points to add!");
    }
    else
    {
        break;
    }
}

// Multiply points
Multiplier = irandom(8) + 1;
show_message("Your lucky number is " + string(Multiplier) + "!##You will gain " + string(Points * Multiplier) + " points.");
Score += Points * Multiplier;