 
 
 // possible values for a pixel;
-#define BLACK  0
-#define GREEN  1
-#define RED    2
-#define ORANGE 3
-
+const int BLACK  =0;
+const int GREEN  =1;
+const int RED    =2;
+const int ORANGE =3;
 
 #define cls          ht1632_clear
 


void loop ()
{
   // cls; // clear screen
   // plot(x, y, color); put a certain pixel on (BLACK = OFF)
   // plot_rect(x_left_upper, y_left_upper, x_right_down, y_right_down, color); // fill a rectangle
   // vertical_bar(x_position, width, height); colored bard vertically (Orange - green - red)
   // plot_char('A', x, y, color); // charachters should be uppercase! x, y = upper left corner; returns the width of the character plotted
   // plot_int( number_to_display, x, y, number_of_chars, color); if to little space to display: drops higher numbers

/*
plot_char('8',0,0,GREEN);
delay(2500);
plot_char('8',0,0,BLACK);
plot_char('6',0,0,GREEN);
delay(2500);
plot_char('6',0,0,BLACK);
plot_char('9',0,0,GREEN);
delay(2500);
plot_char('9',0,0,BLACK);
*/


  // read the input on analog pin 0:
  int sensorValue = analogRead(A0);
  // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):

  plot_int(ufvoltage,0,0,2,BLACK);
  plot_int(voltage,13,0,2,BLACK);
  
}

