[MP2]

The 'keys' variable doesn't store U/D/L/R. That's what the 'updown' and 'leftright' variables are for.

pawn Код:

if(leftright == KEY_LEFT || leftright == KEY_RIGHT)
{
    // They are holding left or right
}

Or alternatively...

pawn Код:

if(leftright) // Not false (0)
{
    // They are holding left or right
}

Also, you want to check if they just STARTED to hold a key, you don't want to keep applying the animation. So to do this, you need to get their old key state (save it in variables).