diff --git a/elevator1/elevator1.ino b/elevator1/elevator1.ino
index 473f199..b754d49 100644
--- a/elevator1/elevator1.ino
+++ b/elevator1/elevator1.ino
@@ -3,7 +3,7 @@ void setup() {
 
 }
 
-class buttons() {
+class button() {
   public:
   int button1 = 22;
   int button2 = 23;
@@ -22,9 +22,16 @@ class led() {
   int led1 = 4;
   int led2 = 5;
   int led3 = 6;
-    void on(ledNumber) {
-      //out
-    }
+};
+
+class detectors() {
+  public:
+  int detector1b = 25;
+  int detector1t = 26;
+  int detector1b = 27;
+  int detector2t = 28;
+  int detector3b = 29;
+  int detector3t = 30;
 };
 
 void loop() {
diff --git a/gpio_usage.ods b/gpio_usage.ods
index b890028..24d20a8 100644
Binary files a/gpio_usage.ods and b/gpio_usage.ods differ