Slime or honey block properties

Noone helped you yet...

Here is what the slime block uses

   public void onFallenUpon(World worldIn, BlockPos pos, Entity entityIn, float fallDistance) {
      if (entityIn.isSuppressingBounce()) {
         super.onFallenUpon(worldIn, pos, entityIn, fallDistance);
      } else {
         entityIn.onLivingFall(fallDistance, 0.0F);
      }

   }

   /**
    * Called when an Entity lands on this Block. This method *must* update motionY because the entity will not do that
    * on its own
    */
   public void onLanded(IBlockReader worldIn, Entity entityIn) {
      if (entityIn.isSuppressingBounce()) {
         super.onLanded(worldIn, entityIn);
      } else {
         this.func_226946_a_(entityIn);
      }

   }

   private void func_226946_a_(Entity p_226946_1_) {
      Vec3d vec3d = p_226946_1_.getMotion();
      if (vec3d.y < 0.0D) {
         double d0 = p_226946_1_ instanceof LivingEntity ? 1.0D : 0.8D;
         p_226946_1_.setMotion(vec3d.x, -vec3d.y * d0, vec3d.z);
      }

   }

I just took out this snippet from the slime block, play around with it.

How would I go about implementing this? I'm very unfamiliar with putting custom code in ^u^;

You need to code your block there is a option in your Mcreator that is for coding, use it and if you are beginner o  this you can see tutorials or the code of some blocks of Minecraft. If you browse in Mcreator you can see the code of slime block and honey block.