diff --git a/twinmax/display.cpp b/twinmax/display.cpp
index a625243..ad1940e 100644
--- a/twinmax/display.cpp
+++ b/twinmax/display.cpp
@@ -1,12 +1,7 @@
-#include <Arduino.h>
-#include <string.h>
 #include "display.h"
 
-#include <Wire.h>
-
-#define WIRE_MAX			32
-#define TRANSACTION_START	wire->setClock(400000UL);
-#define TRANSACTION_END		wire->setClock(100000UL);
+#include <Arduino.h>
+#include <string.h>
 
 void temporary(){
 
@@ -21,7 +16,7 @@ void temporary(){
 	display.begin();
 
 	// display.clearDisplay();
-	display.clear(true); // no need to call display() after to apply
+	display.clear(); // no need to call display() after to apply
 
 	// display.drawPixel(x, y, SSD1306_WHITE)
 	// display.drawPixel(x, y, SSD1306_BLACK)
@@ -36,11 +31,9 @@ void Display::send_command(const uint8_t c){
 	_wire->endTransmission();
 }
 
-void Display::send_commands(const uint8_t *cc, const uint8_t n){
+void Display::send_commands(const uint8_t *cc, uint8_t n){
 	_wire->beginTransmission(_i2caddr);
 	_wire->write((uint8_t) 0x00);
-	_wire->write(c);
-	_wire->endTransmission();
 	uint8_t written = 1;
 	while(n--){
 		if( written >= WIRE_MAX ){
@@ -56,22 +49,22 @@ void Display::send_commands(const uint8_t *cc, const uint8_t n){
 }
 
 
-void Display::Display(const resetPin){
+Display::Display(const uint8_t resetPin){
 	_rstPin = resetPin;
 	_wire = &Wire;
 }
 
 void Display::begin(){
-	_wire.begin();
+	_wire->begin();
 
 	// reset sequence
 	if( _rstPin >= 0 ){
-		pinMode(rstPin, OUTPUT);
-		digitalWrite(rstPin, HIGH);
+		pinMode(_rstPin, OUTPUT);
+		digitalWrite(_rstPin, HIGH);
 		delay(1);
-		digitalWrite(rstPin, LOW);
+		digitalWrite(_rstPin, LOW);
 		delay(10);
-		digitalWrite(rstPin, HIGH);
+		digitalWrite(_rstPin, HIGH);
 	}
 
 	TRANSACTION_START
@@ -92,7 +85,7 @@ void Display::begin(){
 		DSP_SETSTARTLINE | 0x0,
 		DSP_CHARGEPUMP
 	};
-	sendcommands(init2, sizeof(init2));
+	send_commands(init2, sizeof(init2));
 	send_command(0x14);
 
 	static const uint8_t PROGMEM init3[] = {
@@ -101,24 +94,24 @@ void Display::begin(){
 		DSP_SEGREMAP | 0x1,
 		DSP_COMSCANDEC
 	};
-	sendcommands(init3, sizeof(init3));
+	send_commands(init3, sizeof(init3));
 
-	sendcommand(DSP_SETCOMPINS);
-	sendcommand(_comPin);
-	sendcommand(DSP_SETCONTRAST);
-	sendcommand(_contrast);
+	send_command(DSP_SETCOMPINS);
+	send_command(_comPin);
+	send_command(DSP_SETCONTRAST);
+	send_command(_contrast);
 	send_command(DSP_SETPRECHARGE);
 	send_command(0xF1);
 
 	static const uint8_t PROGMEM init5[] = {
-		DSP_SETVCOMPDETECT,
+		DSP_SETVCOMDETECT,
 		0x40,
 		DSP_DISPLAYALLON_RESUME,
 		DSP_NORMALDISPLAY,
 		DSP_DEACTIVATE_SCROLL,
 		DSP_DISPLAYON
 	};
-	sendcommands(init5, sizeof(init5));
+	send_commands(init5, sizeof(init5));
 
 	TRANSACTION_END
 
@@ -154,4 +147,10 @@ void Display::clear(){
 	_wire->endTransmission();
 
 	TRANSACTION_END
+}
+
+// draws a progress bar to a fixed location
+// the progress value is between 0 and 255
+void Display::progress(const uint8_t progress){
+
 }
\ No newline at end of file
diff --git a/twinmax/display.h b/twinmax/display.h
index dee7f42..448eb54 100644
--- a/twinmax/display.h
+++ b/twinmax/display.h
@@ -1,6 +1,13 @@
 #ifndef _DISPLAY_H_DEF_
 #define _DISPLAY_H_DEF_
 
+	#include <Wire.h>
+
+	#define WIRE_MAX			32
+	#define TRANSACTION_START	_wire->setClock(400000UL);
+	#define TRANSACTION_END		_wire->setClock(100000UL);
+
+
 	#define DSP_MEMORYMODE          0x20 ///< See datasheet
 	#define DSP_COLUMNADDR          0x21 ///< See datasheet
 	#define DSP_PAGEADDR            0x22 ///< See datasheet
@@ -39,9 +46,10 @@
 
 	class Display {
 		public:
-			void Display(const uint8_t width=128, const uint8_t height=32, const resetPin=-1);
+			Display(const uint8_t resetPin=-1);
 			void begin();
 			void clear();
+			void progress(const uint8_t progress);
 
 		protected:
 			void send_command(const uint8_t c);
@@ -52,8 +60,8 @@
 			const uint8_t _comPin   { 0x02 };
 			const uint8_t _i2caddr  { 0x3C };
 			const uint8_t _contrast { 0x8F };
-			uint8_t  _rstPin { -1   };
-			TwoWire* _wire   { nullptr };
+			uint8_t       _rstPin   { -1   };
+			TwoWire*      _wire     { nullptr };
 	};
 
 #endif