From abeb378b175b6ac99a31f40272015558539afc22 Mon Sep 17 00:00:00 2001
From: Peli de Halleux <pelikhan@users.noreply.github.com>
Date: Fri, 5 Jan 2018 21:20:00 -0800
Subject: [PATCH] reverse beeper

---
 docs/coding.md                  | 22 ++++++++++++++++++++++
 docs/coding/reverse-beeper-1.md | 11 +++++++++++
 docs/coding/reverse-beeper-2.md | 13 +++++++++++++
 docs/coding/reverse-beeper-3.md | 21 +++++++++++++++++++++
 4 files changed, 67 insertions(+)
 create mode 100644 docs/coding/reverse-beeper-1.md
 create mode 100644 docs/coding/reverse-beeper-2.md
 create mode 100644 docs/coding/reverse-beeper-3.md

diff --git a/docs/coding.md b/docs/coding.md
index f5a428ec..071a1834 100644
--- a/docs/coding.md
+++ b/docs/coding.md
@@ -90,3 +90,25 @@
 }
 ]
 ```
+
+## Reverse Bepper
+
+```codecard
+[{
+  "name": "Reverse Beeper",
+  "description": "Activity 1",
+  "url":"/coding/reverse-beeper-1",
+  "cardType": "example"
+}, {
+  "name": "Reverse Beeper",
+  "description": "Activity 2",
+  "url":"/coding/reverse-beeper-2",
+  "cardType": "example"
+}, {
+  "name": "Reverse Beeper",
+  "description": "Activity 3",
+  "url":"/coding/reverse-beeper-3",
+  "cardType": "example"
+}
+]
+```
diff --git a/docs/coding/reverse-beeper-1.md b/docs/coding/reverse-beeper-1.md
new file mode 100644
index 00000000..54f10c53
--- /dev/null
+++ b/docs/coding/reverse-beeper-1.md
@@ -0,0 +1,11 @@
+# Reverse Beeper Activity 1
+
+```blocks
+loops.forever(function () {
+    music.playTone(440, sensors.ultrasonic4.distance());
+    loops.pause(50)
+})
+motors.largeBC.setSpeed(-20);
+sensors.ultrasonic4.pauseUntil(UltrasonicSensorEvent.ObjectNear);
+motors.stopAllMotors();
+```
diff --git a/docs/coding/reverse-beeper-2.md b/docs/coding/reverse-beeper-2.md
new file mode 100644
index 00000000..9c3df90f
--- /dev/null
+++ b/docs/coding/reverse-beeper-2.md
@@ -0,0 +1,13 @@
+# Reverse Beeper Activity 2
+
+```blocks
+loops.forever(function () {
+    if (motors.largeB.speed() != 0 && sensors.ultrasonic4.distance() < 20) {
+        music.playTone(440, sensors.ultrasonic4.distance());
+        loops.pause(50)
+    }
+})
+motors.largeBC.setSpeed(-20);
+sensors.ultrasonic4.pauseUntil(UltrasonicSensorEvent.ObjectNear);
+motors.stopAllMotors();
+```
diff --git a/docs/coding/reverse-beeper-3.md b/docs/coding/reverse-beeper-3.md
new file mode 100644
index 00000000..557883e6
--- /dev/null
+++ b/docs/coding/reverse-beeper-3.md
@@ -0,0 +1,21 @@
+# Reverse Beeper Activity 2
+
+```blocks
+let beep = false
+beep = true
+control.runInBackground(function () {
+    motors.largeB.setSpeed(-20)
+    motors.largeC.setSpeed(-20)
+    sensors.ultrasonic4.pauseUntil(UltrasonicSensorEvent.ObjectNear)
+    motors.stopAllMotors()
+    beep = false
+})
+control.runInBackground(function () {
+    while (beep) {
+        if (sensors.ultrasonic4.distance() < 20) {
+            music.playTone(440, sensors.ultrasonic4.distance())
+            loops.pause(50)
+        }
+    }
+})
+```