import object from another file

[tbutton]

hello, i have 2 files - main.nim and objects.nim main.nim: 
    
    
    import libs/csfml/csfml
    import libs/opengl/opengl
    import objects
    
    var window = newRenderWindow(videoMode(500, 500), "OpenGL")
    window.verticalSyncEnabled = true
    
    opengl.loadExtensions()
    
    var event: Event
    
    while window.open:
      while window.pollEvent(event):
        case event.kind
          of EventType.Resized:
            glViewport(0, 0, event.size.width, event.size.height)
          of EventType.Closed:
            window.close()
          else: discard
      
      window.clear Black
      glRotatef(1,0,0,1)
      
      var a:object3d;
      object3d.draw
      
      window.display()
    
    window.destroy()
    
    
    
    Run

objects.nim: 
    
    
    import libs/opengl/opengl
    type
      object3d = object
    
    proc draw(this: object3d) =
      glBegin GL_TRIANGLES; block:
        glColor3f(0.0, 1.0, 0.0); glVertex2f(-1.0,  1.0)
        glColor3f(1.0, 0.5, 0.0); glVertex2f( 1.0,  0.0)
        glColor3f(0.0, 0.5, 1.0); glVertex2f( 0.0, -1.0)
      glEnd()
        
    
    Run

and this code does not work. compiler writes: main.nim(24, 9) Error: undeclared 
identifier: 'object3d' but why? i used import - 
    
    
     objects
    
    Run

. everything must work, import dirrective adds code from objects.nim to 
main.nim and everything is should be compiled. please help me, i really dont 
know, why my code does not want to work