diff --git a/vocoder/static/p5js/p5.collide2d.min.js b/vocoder/static/p5js/p5.collide2d.min.js
new file mode 100644
index 0000000..263ec76
--- /dev/null
+++ b/vocoder/static/p5js/p5.collide2d.min.js
@@ -0,0 +1,9 @@
+/*
+Repo: https://github.com/bmoren/p5.collide2D/
+Created by http://benmoren.com
+Some functions and code modified version from http://www.jeffreythompson.org/collision-detection
+Version 0.6 | Nov 28th, 2018
+CC BY-NC-SA 4.0
+*/
+
+console.log("### p5.collide ###"),p5.prototype._collideDebug=!1,p5.prototype.collideDebug=function(i){_collideDebug=i},p5.prototype.collideRectRect=function(i,t,e,o,r,l,n,c){return i+e>=r&&i<=r+n&&t+o>=l&&t<=l+c},p5.prototype.collideRectCircle=function(i,t,e,o,r,l,n){var c=r,p=l;return r<i?c=i:r>i+e&&(c=i+e),l<t?p=t:l>t+o&&(p=t+o),this.dist(r,l,c,p)<=n/2},p5.prototype.collideCircleCircle=function(i,t,e,o,r,l){return this.dist(i,t,o,r)<=e/2+l/2},p5.prototype.collidePointCircle=function(i,t,e,o,r){return this.dist(i,t,e,o)<=r/2},p5.prototype.collidePointEllipse=function(i,t,e,o,r,l){var n=r/2,c=l/2;if(i>e+n||i<e-n||t>o+c||t<o-c)return!1;var p=i-e,s=t-o,d=c*this.sqrt(this.abs(n*n-p*p))/n;return s<=d&&s>=-d},p5.prototype.collidePointRect=function(i,t,e,o,r,l){return i>=e&&i<=e+r&&t>=o&&t<=o+l},p5.prototype.collidePointLine=function(i,t,e,o,r,l,n){var c=this.dist(i,t,e,o),p=this.dist(i,t,r,l),s=this.dist(e,o,r,l);return void 0===n&&(n=.1),c+p>=s-n&&c+p<=s+n},p5.prototype.collideLineCircle=function(i,t,e,o,r,l,n){var c=this.collidePointCircle(i,t,r,l,n),p=this.collidePointCircle(e,o,r,l,n);if(c||p)return!0;var s=i-e,d=t-o,u=this.sqrt(s*s+d*d),h=((r-i)*(e-i)+(l-t)*(o-t))/this.pow(u,2),y=i+h*(e-i),f=t+h*(o-t);return!!this.collidePointLine(y,f,i,t,e,o)&&(this._collideDebug&&this.ellipse(y,f,10,10),s=y-r,d=f-l,this.sqrt(s*s+d*d)<=n/2)},p5.prototype.collideLineLine=function(i,t,e,o,r,l,n,c,p){var s=((n-r)*(t-l)-(c-l)*(i-r))/((c-l)*(e-i)-(n-r)*(o-t)),d=((e-i)*(t-l)-(o-t)*(i-r))/((c-l)*(e-i)-(n-r)*(o-t));if(s>=0&&s<=1&&d>=0&&d<=1){if(this._collideDebug||p)var u=i+s*(e-i),h=t+s*(o-t);return this._collideDebug&&this.ellipse(u,h,10,10),!p||{x:u,y:h}}return!!p&&{x:!1,y:!1}},p5.prototype.collideLineRect=function(i,t,e,o,r,l,n,c,p){var s,d,u,h,y;return p?(s=this.collideLineLine(i,t,e,o,r,l,r,l+c,!0),d=this.collideLineLine(i,t,e,o,r+n,l,r+n,l+c,!0),u=this.collideLineLine(i,t,e,o,r,l,r+n,l,!0),h=this.collideLineLine(i,t,e,o,r,l+c,r+n,l+c,!0),y={left:s,right:d,top:u,bottom:h}):(s=this.collideLineLine(i,t,e,o,r,l,r,l+c),d=this.collideLineLine(i,t,e,o,r+n,l,r+n,l+c),u=this.collideLineLine(i,t,e,o,r,l,r+n,l),h=this.collideLineLine(i,t,e,o,r,l+c,r+n,l+c)),!!(s||d||u||h)&&(!p||y)},p5.prototype.collidePointPoly=function(i,t,e){for(var o=!1,r=0,l=0;l<e.length;l++){r=l+1,r==e.length&&(r=0);var n=e[l],c=e[r];(n.y>t&&c.y<t||n.y<t&&c.y>t)&&i<(c.x-n.x)*(t-n.y)/(c.y-n.y)+n.x&&(o=!o)}return o},p5.prototype.collideCirclePoly=function(i,t,e,o,r){void 0==r&&(r=!1);for(var l=0,n=0;n<o.length;n++){l=n+1,l==o.length&&(l=0);var c=o[n],p=o[l];if(this.collideLineCircle(c.x,c.y,p.x,p.y,i,t,e))return!0}if(1==r){if(this.collidePointPoly(i,t,o))return!0}return!1},p5.prototype.collideRectPoly=function(i,t,e,o,r,l){void 0==l&&(l=!1);for(var n=0,c=0;c<r.length;c++){n=c+1,n==r.length&&(n=0);var p=r[c],s=r[n];if(this.collideLineRect(p.x,p.y,s.x,s.y,i,t,e,o))return!0;if(1==l){if(this.collidePointPoly(i,t,r))return!0}}return!1},p5.prototype.collideLinePoly=function(i,t,e,o,r){for(var l=0,n=0;n<r.length;n++){l=n+1,l==r.length&&(l=0);var c=r[n].x,p=r[n].y,s=r[l].x,d=r[l].y;if(this.collideLineLine(i,t,e,o,c,p,s,d))return!0}return!1},p5.prototype.collidePolyPoly=function(i,t,e){void 0==e&&(e=!1);for(var o=0,r=0;r<i.length;r++){o=r+1,o==i.length&&(o=0);var l=i[r],n=i[o],c=this.collideLinePoly(l.x,l.y,n.x,n.y,t);if(c)return!0;if(1==e&&(c=this.collidePointPoly(t[0].x,t[0].y,i)))return!0}return!1},p5.prototype.collidePointTriangle=function(i,t,e,o,r,l,n,c){var p=this.abs((r-e)*(c-o)-(n-e)*(l-o));return this.abs((e-i)*(l-t)-(r-i)*(o-t))+this.abs((r-i)*(c-t)-(n-i)*(l-t))+this.abs((n-i)*(o-t)-(e-i)*(c-t))==p},p5.prototype.collidePointPoint=function(i,t,e,o,r){return void 0==r&&(r=0),this.dist(i,t,e,o)<=r},p5.prototype.collidePointArc=function(i,t,e,o,r,l,n,c){void 0==c&&(c=0);var p=this.createVector(i,t),s=this.createVector(e,o),d=this.createVector(r,0).rotate(l),u=p.copy().sub(s);if(p.dist(s)<=r+c){var h=d.dot(u),y=d.angleBetween(u);if(h>0&&y<=n/2&&y>=-n/2)return!0}return!1};
diff --git a/vocoder/static/vocoder.js b/vocoder/static/vocoder.js
index a068af4..87b06b6 100644
--- a/vocoder/static/vocoder.js
+++ b/vocoder/static/vocoder.js
@@ -120,8 +120,28 @@ class GeneratedShape {
     this.xSpeed = 1.3;
     this.ySpeed = 0.7;
 
-    this.xDirection = 1; // left or right
-    this.yDirection = 1; // top or bottom
+    this.xDirection = 1;
+    this.yDirection = 1;
+  }
+
+  collide() {
+    /**
+     * Detect if the shape collides with another shape.
+     **/
+    // TODO: here's what I think we need to do here: there are multiple shapes
+    // on the canvas so we need to take each shape (that isn't this shape) and
+    // find out if we're colliding. If so, then we return a "true" value which
+    // can then be used for generating sounds
+    return false; // TODO: placeholder for now ...
+  }
+
+  sound() {
+    /**
+     * Play a sound after a collision is detected.
+     **/
+    // TODO: play some nice sounds in response to a collision
+    // thinking about https://github.com/Tonejs/Tone.js
+    return; // TODO: placeholder for now ...
   }
 
   move() {
@@ -144,6 +164,7 @@ class GeneratedShape {
     /**
      * Show the shape on the canvas.
      **/
+    // TODO: use getSoundInfo function to influence how shape is drawn
     ellipse(this.x, this.y, this.w, this.h); // TODO: experimenting for now ...
   }
 }
@@ -171,6 +192,12 @@ function draw() {
   for (var i = 0; i < shapes.length; i++) {
     var shape = shapes[i];
     shape.move();
+
+    // TODO: need to implement this
+    if (shape.collide()) {
+      shape.sound();
+    }
+
     shape.display();
   }
 }
diff --git a/vocoder/templates/index.html b/vocoder/templates/index.html
index 5d73192..74ab25b 100644
--- a/vocoder/templates/index.html
+++ b/vocoder/templates/index.html
@@ -27,6 +27,7 @@
     <script src="/static/mappajs/mappa.min.js" charset="utf-8"></script>
     <script src="/static/p5js/p5.min.js" charset="utf-8"></script>
     <script src="/static/p5js/p5.sound.min.js" charset="utf-8"></script>
+    <script src="/static/p5js/p5.collide2d.min.js" charset="utf-8"></script>
     <script src="/static/vocoder.js" charset="utf-8"></script>
   </body>
 </html>