diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..72f1563
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+._*
\ No newline at end of file
diff --git a/sketch_06_07/sketch_06_07.pde b/sketch_06_07/sketch_06_07.pde
index 39d3fc6..929daa3 100644
--- a/sketch_06_07/sketch_06_07.pde
+++ b/sketch_06_07/sketch_06_07.pde
@@ -1,26 +1,26 @@
 //sketch 06-07
 
-#include <Bounce.h>
+#include <Bounce2.h>
 
 int inputPin = 5;
 int ledPin = 13;
 
 int ledValue = LOW;
-Bounce bouncer = Bounce(inputPin, 5); 
+Bounce bouncer = Bounce();
 
-void setup() 
-{
-  pinMode(inputPin, INPUT);
-  digitalWrite(inputPin, HIGH);
-  pinMode(ledPin, OUTPUT);
-}
+void setup() {
+ pinMode(ledPin, OUTPUT);
 
-void loop() 
-{
-   if (bouncer.update() && bouncer.read() == LOW) 
-   {
-       ledValue = ! ledValue;
-       digitalWrite(ledPin, ledValue);
-   }
+ pinMode(inputPin, INPUT);
+ digitalWrite(inputPin, HIGH);
+ 
+ bouncer.attach(inputPin);
+ bouncer.interval(5);
 }
 
+void loop() {
+  if (bouncer.update() && bouncer.read() == LOW) {
+   ledValue = ! ledValue;
+   digitalWrite(ledPin, ledValue);
+  }
+}
diff --git a/sketch_08_01/sketch_08_01.pde b/sketch_08_01/sketch_08_01.pde
index 8daf31c..aa13cef 100644
--- a/sketch_08_01/sketch_08_01.pde
+++ b/sketch_08_01/sketch_08_01.pde
@@ -3,49 +3,49 @@
 int ledPin = 13;
 int dotDelay = 200;
 
-PROGMEM prog_char sA[]  = ".-";
-PROGMEM prog_char sB[]  = "-...";
-PROGMEM prog_char sC[]  = "-.-.";
-PROGMEM prog_char sD[]  = "-..";
-PROGMEM prog_char sE[]  = ".";
-PROGMEM prog_char sF[]  = "..-.";
-PROGMEM prog_char sG[]  = "--.";
-PROGMEM prog_char sH[]  = "....";
-PROGMEM prog_char sI[]  = "..";
-PROGMEM prog_char sJ[]  = ".---";
-PROGMEM prog_char sK[]  = "-.-";
-PROGMEM prog_char sL[]  = ".-..";
-PROGMEM prog_char sM[]  = "--";
-PROGMEM prog_char sN[]  = "-.";
-PROGMEM prog_char sO[]  = "---";
-PROGMEM prog_char sP[]  = ".--.";
-PROGMEM prog_char sQ[]  = "--.-";
-PROGMEM prog_char sR[]  = ".-.";
-PROGMEM prog_char sS[]  = "...";
-PROGMEM prog_char sT[]  = "-";
-PROGMEM prog_char sU[]  = "..-";
-PROGMEM prog_char sV[]  = "...-";
-PROGMEM prog_char sW[]  = ".--";
-PROGMEM prog_char sX[]  = "-..-";
-PROGMEM prog_char sY[]  = "-.--";
-PROGMEM prog_char sZ[]  = "--..";
+const PROGMEM char sA[]  = ".-";
+const PROGMEM char sB[]  = "-...";
+const PROGMEM char sC[]  = "-.-.";
+const PROGMEM char sD[]  = "-..";
+const PROGMEM char sE[]  = ".";
+const PROGMEM char sF[]  = "..-.";
+const PROGMEM char sG[]  = "--.";
+const PROGMEM char sH[]  = "....";
+const PROGMEM char sI[]  = "..";
+const PROGMEM char sJ[]  = ".---";
+const PROGMEM char sK[]  = "-.-";
+const PROGMEM char sL[]  = ".-..";
+const PROGMEM char sM[]  = "--";
+const PROGMEM char sN[]  = "-.";
+const PROGMEM char sO[]  = "---";
+const PROGMEM char sP[]  = ".--.";
+const PROGMEM char sQ[]  = "--.-";
+const PROGMEM char sR[]  = ".-.";
+const PROGMEM char sS[]  = "...";
+const PROGMEM char sT[]  = "-";
+const PROGMEM char sU[]  = "..-";
+const PROGMEM char sV[]  = "...-";
+const PROGMEM char sW[]  = ".--";
+const PROGMEM char sX[]  = "-..-";
+const PROGMEM char sY[]  = "-.--";
+const PROGMEM char sZ[]  = "--..";
 
-PROGMEM const char* letters[] = {sA, sB, sC, sD, sE, sF, sG, sH, sI, sJ, sK, sL, sM,
+const PROGMEM char* const letters[] = {sA, sB, sC, sD, sE, sF, sG, sH, sI, sJ, sK, sL, sM,
                                 sN, sO, sP, sQ, sR, sS, sT, sU, sV, sW, sX, sY, sZ};
 
-PROGMEM prog_char s0[]  = "-----";
-PROGMEM prog_char s1[]  = ".----";
-PROGMEM prog_char s2[]  = "..---";
-PROGMEM prog_char s3[]  = "...--";
-PROGMEM prog_char s4[]  = "....-";
-PROGMEM prog_char s5[]  = ".....";
-PROGMEM prog_char s6[]  = "-....";
-PROGMEM prog_char s7[]  = "--...";
-PROGMEM prog_char s8[]  = "---..";
-PROGMEM prog_char s9[]  = "----.";
+const PROGMEM char s0[]  = "-----";
+const PROGMEM char s1[]  = ".----";
+const PROGMEM char s2[]  = "..---";
+const PROGMEM char s3[]  = "...--";
+const PROGMEM char s4[]  = "....-";
+const PROGMEM char s5[]  = ".....";
+const PROGMEM char s6[]  = "-....";
+const PROGMEM char s7[]  = "--...";
+const PROGMEM char s8[]  = "---..";
+const PROGMEM char s9[]  = "----.";
 
 
-PROGMEM const char* numbers[] = {s0, s1, s2, s3, s4, s5, s6, s7, s8, s9};
+const PROGMEM char* const numbers[] = {s0, s1, s2, s3, s4, s5, s6, s7, s8, s9};
 
 char buffer[6];
 
@@ -109,4 +109,3 @@ void flashDotOrDash(char dotOrDash)
   delay(dotDelay); // gap between flashes
 }
 
-