Gamemaker Movement Step Code

////STEP EVENT - "obj_char"/////

//values
verticalSpeed = 2;
horizontalSpeed = 2;
global.mainDirection = "idle";
//defaults
verticalSpeedDEFAULT = 2;
horizontalSpeedDEFAULT = 2;


////KEYBOARD -- "obj_char"/////

//up
if keyboard_check(vk_up)
{
    y-=verticalSpeed;
    //dir
    global.mainDirection = "up";
}
//down
if keyboard_check(vk_down)
{
    y+=verticalSpeed;
    //dir
    global.mainDirection = "down";
}
//left
if keyboard_check(vk_left)
{
    x-=horizontalSpeed;
    //dir
    global.mainDirection = "left";
}
//right
if keyboard_check(vk_right)
{
    x+=horizontalSpeed;
    //dir
    global.mainDirection = "right";
}
///////////////////////////////////
//shift (run) {vertical}
if verticalSpeed <= 2.001
{
    if keyboard_check(vk_shift)
    {
         //verticalChanges
         if keyboard_check(vk_up)
         {
         y -= verticalSpeed * 1.15
         }

         if keyboard_check(vk_down)
         {
         y += verticalSpeed * 1.15
         }
    }
else
    {
    verticalSpeed = verticalSpeedDEFAULT
    }

}

//shift (run) {horizontal}
if horizontalSpeed <= 2.001
{
    if keyboard_check(vk_shift)
    {
         //horizontalChanges
         if keyboard_check(vk_left)
         {
         x -= horizontalSpeed * 1.15
         }

         if keyboard_check(vk_right)
         {
         x += horizontalSpeed * 1.15
         }
    }
else
    {
    horizontalSpeed = horizontalSpeedDEFAULT
    }

}
///////////////////////////////////