diff --git a/demo/fw/src/main.c b/demo/fw/src/main.c
index e63c53c..5c8f39f 100644
--- a/demo/fw/src/main.c
+++ b/demo/fw/src/main.c
@@ -420,7 +420,11 @@ int main(void)
             p = endl + 1;
             endl = __strchrnul(p, '\n');
         }
-        spif_printf(&spif, " \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n", dec_buf);
+
+        spif_printf(&spif, "\033[1;40;32m");
+        for (size_t i=0; i<300; i++) {
+            spif_printf(&spif, " \n");
+        }
 
         //for (int j=0; j<1000000; j++) {
             /* pass */