diff --git a/CHANGELOG.md b/CHANGELOG.md
index ac07159..0c9a77e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,3 @@
-## [0.0.1] - TODO: Add release date.
+## [0.1.0]
 
-* TODO: Describe initial release.
+* Initial Open Source release.
diff --git a/lib/miniplayer.dart b/lib/miniplayer.dart
index 139d16a..e30023a 100644
--- a/lib/miniplayer.dart
+++ b/lib/miniplayer.dart
@@ -1,7 +1,145 @@
 library miniplayer;
 
-/// A Calculator.
-class Calculator {
-  /// Returns [value] plus 1.
-  int addOne(int value) => value + 1;
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+
+typedef Widget MiniplayerBuilder(double height, double percentage);
+
+class Miniplayer extends StatefulWidget {
+  final double minHeight;
+  final double maxHeight;
+  final MiniplayerBuilder builder;
+  final Curve curve;
+
+  const Miniplayer(
+      {Key key,
+      @required this.minHeight,
+      @required this.maxHeight,
+      @required this.builder,
+      this.curve = Curves.easeInQuart})
+      : super(key: key);
+
+  @override
+  _MiniplayerState createState() => _MiniplayerState();
+}
+
+class _MiniplayerState extends State<Miniplayer> with TickerProviderStateMixin {
+  double _height;
+  double _prevHeight;
+
+  //Used to set Size after animation is complete
+  double _endHeight;
+  bool _up;
+
+  StreamController<double> _heightController =
+      StreamController<double>.broadcast();
+  AnimationController _animationController;
+  Animation<double> _sizeAnimation;
+
+  @override
+  void initState() {
+    _animationController = AnimationController(
+      vsync: this,
+      duration: Duration(
+        milliseconds: 300,
+      ),
+    );
+
+    _animationController.addStatusListener((status) {
+      if (status == AnimationStatus.completed) {
+        _animationController.reset();
+        _heightController.add(_endHeight);
+        _height = _endHeight;
+      }
+    });
+
+    _height = widget.minHeight;
+    super.initState();
+  }
+
+  @override
+  void dispose() {
+    _heightController.close();
+    _animationController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return StreamBuilder(
+      initialData: widget.minHeight,
+      stream: _heightController.stream,
+      builder: (context, AsyncSnapshot<double> snapshot) {
+        if (snapshot.hasData) {
+          var _percentage = ((snapshot.data - widget.minHeight)) /
+              (widget.maxHeight - widget.minHeight);
+
+          return Stack(
+            alignment: Alignment.bottomCenter,
+            children: [
+              if (_percentage > 0)
+                GestureDetector(
+                  onTap: () => animateToHeight(widget.minHeight),
+                  child: Container(
+                      color: Colors.black.withOpacity(_percentage * 0.5)),
+                ),
+              SizedBox(
+                height: snapshot.data,
+                child: GestureDetector(
+                  child: widget.builder(snapshot.data, _percentage),
+                  onTap: () {
+                    bool up = _height != widget.maxHeight;
+                    animateToHeight(up ? widget.maxHeight : widget.minHeight);
+                  },
+                  onPanEnd: (details) async {
+                    if (_up)
+                      animateToHeight(widget.maxHeight);
+                    else
+                      animateToHeight(widget.minHeight);
+                  },
+                  onPanUpdate: (details) {
+                    _prevHeight = _height;
+                    var h = _height -=
+                        details.delta.dy; //details.delta.dy < 0 -> -- = +
+
+                    //Make sure height !> maxHeight && !< minHeight
+                    if (h > widget.maxHeight)
+                      h = widget.maxHeight;
+                    else if (h < widget.minHeight) h = widget.minHeight;
+
+                    if (_prevHeight == h &&
+                        (h == widget.minHeight || h == widget.maxHeight))
+                      return;
+
+                    //print('h: ' + h.toString());
+
+                    _height = h;
+                    _up = _prevHeight < _height;
+
+                    _heightController.add(h);
+                  },
+                ),
+              ),
+            ],
+          );
+        } else
+          return Container();
+      },
+    );
+  }
+
+  void animateToHeight(final double h) {
+    _endHeight = h;
+    _sizeAnimation = Tween(
+      begin: _height,
+      end: h,
+    ).animate(
+        CurvedAnimation(parent: _animationController, curve: widget.curve));
+
+    _sizeAnimation.addListener(() {
+      _heightController.add(_sizeAnimation.value);
+    });
+    _animationController.forward();
+  }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 965f6ba..59f4ed4 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,8 +1,8 @@
 name: miniplayer
 description: Miniplayer for Flutter
 version: 0.0.1
-author:
-homepage:
+author: David Peters
+homepage: peterscode.dev
 
 environment:
   sdk: ">=2.7.0 <3.0.0"
@@ -12,10 +12,6 @@ dependencies:
   flutter:
     sdk: flutter
 
-dev_dependencies:
-  flutter_test:
-    sdk: flutter
-
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec
 
diff --git a/test/miniplayer_test.dart b/test/miniplayer_test.dart
deleted file mode 100644
index 7116eaa..0000000
--- a/test/miniplayer_test.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-import 'package:flutter_test/flutter_test.dart';
-
-import 'package:miniplayer/miniplayer.dart';
-
-void main() {
-  test('adds one to input values', () {
-    final calculator = Calculator();
-    expect(calculator.addOne(2), 3);
-    expect(calculator.addOne(-7), -6);
-    expect(calculator.addOne(0), 1);
-    expect(() => calculator.addOne(null), throwsNoSuchMethodError);
-  });
-}