<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Carl,<div class="">You did not mention if you were using Alice 2 or Alice 3. I am assuming that you are using Alice 2.</div><div class=""><br class=""></div><div class="">I created a boolean property for the world, named it isActive, and set its value to false.</div><div class=""><br class=""></div><div class="">I created a world method called startPropellers</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>while isActive</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>do together</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>turn each propeller to the right one revolution in ½ second, abruptly</div><div class=""><br class=""></div><div class="">For the events<br class=""><div><span class="Apple-tab-span" style="white-space:pre"> </span></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>When S is pressed, set isActive to true (I am using A is a toggle switch on)</div><div><span class="Apple-tab-span" style="white-space:pre"> </span></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>When A is pressed, set isActive to false</div><div><br class=""></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>When U is pressed, if isActive, move up ½ meter in ½ second, abruptly. — the drone will not move up if isActive is false</div><div><br class=""></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>When D is pressed, if isActive, move down ½ meter in ½ second, abruptly — the drone will not move down if isActive is false</div><div><br class=""><span class="Apple-tab-span" style="white-space:pre"> </span>When the variable isActive changes, do the startPropellers method</div><div><br class=""></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Let the arrow keys move the drone — These will turn the drone left and right, move the drone forward (up key) and backward (down key)</div><div><br class=""></div><div>I have attached an html document of the code for printing, a copy of the working world, and a copy of the drone.a2c class if anyone does not have it in their gallery.</div><div><br class=""></div><div>Let me know if you are using Alice 3, as the events will be different (and I would be curious as to what model the students were using.)</div><div><br class=""></div><div>Please let me know if you have any questions.</div><div><br class=""></div><div>All the best,</div><div>Don Slater</div><div><br class=""></div><div>Alice Project</div><div><br class=""></div><div></div></div></body></html>