Function will not change input

hi
this code makes me insane:

code: [select]

 void loop()                     // run on , on again
{
 
 for(x=200; x>0; x--)
 {
 uddata(sqa, la0);
 uddata(sqa, la1);
 }
 
 for(x=200; x>0; x--)
 {
 uddata(sqb, la1);
 uddata(sqb, la2);
 }
 
 for(x=200; x>0; x--)
 {
 uddata(sqc, la2);
 uddata(sqc, la3);
 }

}

 void uddata (unsigned int data, int layer)
 {
 if(data>255)
 {
   shiftout(datapin, clockpin, lsbfirst, data);
   shiftout(datapin, clockpin, lsbfirst, (data >> 8));
   }
 else
 {
   shiftout(datapin, clockpin, lsbfirst, 0);
   shiftout(datapin, clockpin, lsbfirst, data);
 }
 digitalwrite(latchpin, high);

 digitalwrite(layer, low);
 delay(1);
 digitalwrite(layer, high);
}  

when finished first loop shifting out 'sqa' doesn't throw away value of 'sqa'.
instead of sending new value of 'sqb' uddata() still uses 'sqa' output.
this gives me 3 for-loops same data-value different 'layer'-value.
anyone knows solution?
hope answer.

where sqa, sqb, , sqc defined/set value?

please post code well.

!c

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