diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..5048358
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 Dawid Wysokiński
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..715aca2
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# map-generator
+
+[TribalWars](https://www.tribalwars.net/en-dk/) server map generation package.
diff --git a/generator/generator.go b/generator/generator.go
index ba75370..94d6be9 100644
--- a/generator/generator.go
+++ b/generator/generator.go
@@ -24,22 +24,28 @@ const (
 type Marker struct {
 	Larger   bool
 	Villages []*models.Village `json:"villages" gqlgen:"villages" xml:"villages"`
-	Color    string            `json:"color" gqlgen:"color" xml:"color"`
+	// Color in HEX format
+	Color string `json:"color" gqlgen:"color" xml:"color"`
 }
 
 type Config struct {
-	Markers              []*Marker
-	Destination          io.Writer
-	MapSize              int
-	ContinentGrid        bool
-	ContinentNumbers     bool
-	BackgroundColor      string
-	GridLineColor        string
+	Markers     []*Marker
+	Destination io.Writer
+	// Default 1000x1000
+	MapSize          int
+	ContinentGrid    bool
+	ContinentNumbers bool
+	// BackgroundColor in HEX format
+	BackgroundColor string
+	// GridLineColor in HEX format
+	GridLineColor string
+	// ContinentNumberColor in HEX format
 	ContinentNumberColor string
 	Scale                float32
 	CenterX              int
 	CenterY              int
-	Quality              int
+	// Quality of image (1-100)
+	Quality int
 }
 
 func (cfg *Config) init() {
@@ -55,7 +61,7 @@ func (cfg *Config) init() {
 	if cfg.MapSize <= 0 {
 		cfg.MapSize = defaultMapSize
 	}
-	if cfg.Quality <= 0 {
+	if cfg.Quality <= 0 || cfg.Quality > 100 {
 		cfg.Quality = defaultQuality
 	}
 	if cfg.Scale < 1 {