//defines  - lets define something to make it easier (you should do the same in your movement script (easier)
#define STAND 0
#define WALK 1
#define RUN 2
#define DUCK 3
#define JUMP 4
#define SWIM 5
//you can add more here...

//the function
function animate(ENTITY* ent) //we overgive the entity to animate - example: animate(player);
{
//Vars&Strings
var anim_per = 0;
var blend_per = 0;
STRING* anim_name = "#30";  //change the 30 if your animation names are longer
while(1)  //if you don't want it to run the whole time, change the 1 to anything else...
{
//Now you need a var or a skill for you actual player movement
//You must set this var in your movement code
//I will use the player.skill1 for my example here
if(player.skill1 == STAND)
{
 if(str_cmpi(anim_name, "stand") == 1) //if we already blended to the standing animation
 {
  ent_animate(ent, "stand", anim_per, ANM_CYCLE); //animate it in its "stand" animation
  anim_per += 5 * time_step; //change 5 if you want
 }
 else //if we are in another animation, we will blend!
 {
  ent_animate(player, last_anim, anim_per, ANM_ADD); //animate him in his last position with its last animation percentage
  ent_blend("stand", 0, blend_per); //blend it to the first frame of the other animation
  blend_per += 5 * time_step; //change the 30 if needed
  anim_per += 5 * time_step; //still animate in the old anim (change 5 if wanted)
  blend_per = clamp(blend_per, 0, 100); //clamp it between 0 and 100
  if(blend_per == 100) //if the blending is finished
  {
   str_cpy(anim_name, "stand"); //change the actual animation to the stand animation
   anim_per = 0; //and change the animation percentage to 0
  }
 }
}
if(player.skill1 == WALK) 
{
 ... here you do the same as for standing, but change every "stand" to "walk"
}
...and so on
wait(1);
}

function shoot()
{
        var shoot_percentage = 0;
	while(shoot_percentage < 100)
	{
		ent_animate(my,NULL,0,0); 
		ent_animate(weapon,"shoot",shoot_percentage,ANM_ADD);
		shoot_percentage += 10 * time_step;
		wait (1);
	}
}

if(str_cmpi(anim_name, "walk") == 1) //if we already blended to the standing animation
			{
				ent_animate(ent, "walk", anim_per, ANM_CYCLE); //animate it in its "stand" animation
				anim_per += 5 * time_step; //change 5 if you want
				str_cpy(anim_name, "walk"); //change the actual animation to the stand animation
				blend_per =0;
			}