Help with RenderWorldLastEvent

[Pr07o7yp3]

I'm trying to draw lines around block but I have a problem.

 

I want to draw lines which could be see through walls, like chest finders in the hacks. (I don't want it for hack )

 

I have this code:

@SubscribeEvent
public void onRender(RenderWorldLastEvent e)
{
	EntityPlayerSP player = Minecraft.getMinecraft().thePlayer;
	double x = player.lastTickPosX + (player.posX - player.lastTickPosX) * e.partialTicks;
        double y = player.lastTickPosY + (player.posY - player.lastTickPosY) * e.partialTicks;
        double z = player.lastTickPosZ + (player.posZ - player.lastTickPosZ) * e.partialTicks;
        
        GL11.glPushMatrix();
        GL11.glTranslated(-x, -y, -z);
        
        GL11.glBegin(GL11.GL_LINES);
        
        GL11.glColor4f(0f, 255f, 237f, 0.3f);
        
        float mx = 0 + 0.5F;
        float my = 66 + 0.5F;
        float mz = 0 + 0.5F;
        
        GL11.glVertex3f(mx + 0.5F, my + 0.5F, mz - 0.5F); GL11.glVertex3f(mx + 0.5F, my - 0.5F, mz - 0.5F);
        GL11.glVertex3f(mx + 0.5F, my - 0.5F, mz - 0.5F); GL11.glVertex3f(mx - 0.5F, my - 0.5F, mz - 0.5F);
        GL11.glVertex3f(mx - 0.5F, my - 0.5F, mz - 0.5F); GL11.glVertex3f(mx - 0.5F, my + 0.5F, mz - 0.5F);
        GL11.glVertex3f(mx - 0.5F, my + 0.5F, mz - 0.5F); GL11.glVertex3f(mx + 0.5F, my + 0.5F, mz - 0.5F);
        
        GL11.glVertex3f(mx + 0.5F, my + 0.5F, mz + 0.5F); GL11.glVertex3f(mx + 0.5F, my - 0.5F, mz + 0.5F);
        GL11.glVertex3f(mx + 0.5F, my - 0.5F, mz + 0.5F); GL11.glVertex3f(mx - 0.5F, my - 0.5F, mz + 0.5F);
        GL11.glVertex3f(mx - 0.5F, my - 0.5F, mz + 0.5F); GL11.glVertex3f(mx - 0.5F, my + 0.5F, mz + 0.5F);
        GL11.glVertex3f(mx - 0.5F, my + 0.5F, mz + 0.5F); GL11.glVertex3f(mx + 0.5F, my + 0.5F, mz + 0.5F);
        
        GL11.glVertex3f(mx + 0.5F, my + 0.5F, mz - 0.5F); GL11.glVertex3f(mx + 0.5F, my + 0.5F, mz + 0.5F);
        GL11.glVertex3f(mx + 0.5F, my - 0.5F, mz - 0.5F); GL11.glVertex3f(mx + 0.5F, my - 0.5F, mz + 0.5F);
        GL11.glVertex3f(mx - 0.5F, my - 0.5F, mz - 0.5F); GL11.glVertex3f(mx - 0.5F, my - 0.5F, mz + 0.5F);
        GL11.glVertex3f(mx - 0.5F, my + 0.5F, mz - 0.5F); GL11.glVertex3f(mx - 0.5F, my + 0.5F, mz + 0.5F);
        
        GL11.glEnd();
        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glPopMatrix();
}

 

Actually it works but the cube disappear after few seconds (I want to stay perma) and I can't see it through walls.

Where am I wrong?