little help with background needed

Code:
// SimpleSpectum.vtx

// Author : vanMiez



float[] vl(256);

float time = 0;

int x;





void Render()

{

    

    time += TIMEPASS;

    gfxSetAspect(0);

    gfxTranslate(-0.3, -1.5, 2.414);



    //gfxColour(0, 0, 0, 0);

       

/*

   // calculate spectrum

   for (x=0;x<256;x=x+1)

    vl[x] = 0;

   for (x=0;x<512;x=x+1)

    vl[x/2] = vl[x/2] + GetSpecLeft(x)+GetSpecRight(x);

*/

   // now draw spectrum

   gfxTranslate(-1,0,1);

   gfxBegin(PRIM_QUADLIST);

   gfxSetTexture(NULL);

 

  

   for (x = 0; x < 256; x++)

   {

   /*

      vl[x] = vl[x]/8;

      if (vl[x]>1.0) vl[x]=1.0;

*/

      

      float spec = GetSpec(x);

      float xPos = x / 100.0f;



      gfxColour(0.3,0.5,0.4,1);

      gfxVertex(xPos+(1/128.0f),0,0);

      gfxVertex(xPos,0,0);

      gfxColour(spec*MIDDLE,spec*TREBLE,spec*BASS,1);

      gfxVertex(xPos,spec*0.6,0);      

      gfxVertex(xPos+(1/128.0f),spec*0.6,0);

   }

   gfxEnd();

 



}