SmartMatrix tearing alternative

diff --git a/src/MatrixTeensy4Hub75Calc_Impl.h b/src/MatrixTeensy4Hub75Calc_Impl.h
index a5afc66..46ca838 100644
--- a/src/MatrixTeensy4Hub75Calc_Impl.h
+++ b/src/MatrixTeensy4Hub75Calc_Impl.h
@@ -168,7 +168,13 @@ FASTRUN void SmartMatrixHub75Calc<refreshDepth, matrixWidth, matrixHeight, panel
         SmartMatrixHub75Calc<refreshDepth, matrixWidth, matrixHeight, panelType, optionFlags>::loadMatrixBuffers(currentRow);
         SmartMatrixRefreshT4<refreshDepth, matrixWidth, matrixHeight, panelType, optionFlags>::writeRowBuffer(currentRow);

-        if (++currentRow >= MATRIX_SCAN_MOD) currentRow = 0;
+        static unsigned int rowCounter = 0;
+        if (rowCounter & 1) {
+            currentRow = MATRIX_SCAN_MOD - 1 - (rowCounter / 2);
+        } else {
+            currentRow = rowCounter / 2;
+        }
+        if (++rowCounter >= MATRIX_SCAN_MOD) rowCounter = 0;

         if (dmaBufferUnderrun) {
             // if refreshrate is too high, lower - minimum set to avoid overflowing timer at low refresh rates