diff --git a/build.ts b/build.ts
index dc8cb41..cf8491b 100755
--- a/build.ts
+++ b/build.ts
@@ -38,17 +38,17 @@ const mapMatchingStrings = {
 };
 
 const spritesMatchingStrings = {
-  0x00_00_00: '0b000_000_00',
-  0x00_00_FF: '0b000_000_11',
-  0x00_FF_00: '0b000_111_00',
-  0x99_50_00: `0b010_001_00`,
-  0x77_77_77: '0b011_011_10',
-  0xB3_B3_B3: '0b100_100_10',
-  0xFF_00_00: '0b111_000_00',
-  0xFF_00_FF: '0b111_000_11',
-  0xFF_80_00: '0b111_100_00',
-  0xFF_FF_00: '0b111_110_00',
-  0xFF_FF_FF: '0b111_111_11',
+  0x00_00_00: '  0', // 0b000_000_00
+  0x00_00_FF: '  3', // 0b000_000_11
+  0x00_FF_00: ' 28', // 0b000_111_00
+  0x99_50_00: ' 68', // 0b010_001_00
+  0x77_77_77: '110', // 0b011_011_10
+  0xB3_B3_B3: '146', // 0b100_100_10
+  0xFF_00_00: '224', // 0b111_000_00
+  0xFF_00_FF: '227', // 0b111_000_11
+  0xFF_80_00: '240', // 0b111_100_00
+  0xFF_FF_00: '248', // 0b111_110_00
+  0xFF_FF_FF: '255', // 0b111_111_11
 };
 
 const mapPath = 'assets/map.ppm';
diff --git a/readme.md b/readme.md
index c004ece..402841e 100755
--- a/readme.md
+++ b/readme.md
@@ -33,8 +33,8 @@ Usage example:
 ```sh
 ./build.ts > /path/to/the/game/schematics/architecture/Symfony/sandbox/main.asm
 
-# script output can easily be piped to strip it off all comments, leading whitespace and empty lines:
-./build.ts | sed 's/\s*;.*//' | sed 's/^\s*//' | sed '/^\d*$/d' > result.asm
+# script output can easily be piped to strip it off all comments, leading whitespace, double spaces and empty lines:
+./build.ts | sed -r 's/\s*;.*//' | sed -r 's/^\s+//' | sed -r 's/ +/ /' | sed -r '/^\s*$/d' > result.asm
 ```
 
 The script is build over Deno's API, so you'll need to have a `deno` binary in your PATH to use it that way.