pressing two buttons at the same time

Hello,
I am really new to this and trying to learn. Right now I am trying to program LED light to light up when you press one button and when you press two buttons, it fades down. The first part is no problem. The problem is to get Arduino understand me pressing two buttons at the same time. Here is what I wrote which neither of them is working. I have tried everything but idk what I am getting wrong. any help?

if (digitalRead (button1)==LOW && redValue< 255){
redValue +=2;}
if (digitalRead(button4)==LOW && redValue> 0){
redValue -=2;}

OR

if (digitalRead (button1)==LOW && redValue< 255){
redValue +=2;}
if (digitalRead(button4)==LOW && digitalRead (button1)==LOW && redValue> 0){
redValue -=2;}

if((digitalRead (button1)==LOW) && (digitalRead(button4)==HIGH) && (redValue < 255))
{
    redValue += 2;
}

if((digitalRead (button1)==LOW) && (digitalRead(button4)==LOW) && (redValue> 0))
{
    redValue -= 2;
}

OMG, Thanks. This has been bothering me for few days. I dont know why I didn't think of that. I really dont know how to thank you.

newguy1000:
OMG, Thanks. This has been bothering me for few days. I dont know why I didn’t think of that. I really dont know how to thank you.

No problem - you could always give karma. I’ll do anything for karma. Anything . . .

Camel:
No problem - you could always give karma. I’ll do anything for karma. Anything . . .

I will give you one for making me laugh