diff --git a/README.md b/README.md
index 37b03bc..3df933b 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,8 @@ A simple programming language.
 
 ## Features
 
-* Fast compilation
-* High performance
-* Small binaries
+* 🔥 Fast compilation
+* 📦 Small binaries
 
 ## Installation
 
diff --git a/examples/fibonacci/fibonacci.q b/examples/fibonacci/fibonacci.q
new file mode 100644
index 0000000..c188e38
--- /dev/null
+++ b/examples/fibonacci/fibonacci.q
@@ -0,0 +1,19 @@
+import sys
+
+main() {
+	let f = fibonacci(11)
+	sys.exit(f)
+}
+
+fibonacci(n Int) -> Int {
+	mut b = 0
+	mut c = 1
+
+	for 0..n {
+		let a = b
+		b = c
+		c = a + b
+	}
+
+	return b
+}
diff --git a/examples/hello/hello.q b/examples/hello/hello.q
index d974d48..4f723f0 100644
--- a/examples/hello/hello.q
+++ b/examples/hello/hello.q
@@ -1,3 +1,3 @@
 main() {
-
+	print("Hello")
 }
diff --git a/main.go b/main.go
index 2a518ef..60febb9 100644
--- a/main.go
+++ b/main.go
@@ -3,7 +3,7 @@ package main
 import (
 	"os"
 
-	"git.akyoto.dev/cli/q/cli"
+	"git.akyoto.dev/cli/q/src/cli"
 )
 
 func main() {
diff --git a/build/Build.go b/src/build/Build.go
similarity index 93%
rename from build/Build.go
rename to src/build/Build.go
index 368b711..0d3df91 100644
--- a/build/Build.go
+++ b/src/build/Build.go
@@ -7,10 +7,10 @@ import (
 	"path/filepath"
 	"strings"
 
-	"git.akyoto.dev/cli/q/directory"
-	"git.akyoto.dev/cli/q/elf"
-	"git.akyoto.dev/cli/q/errors"
-	"git.akyoto.dev/cli/q/log"
+	"git.akyoto.dev/cli/q/src/directory"
+	"git.akyoto.dev/cli/q/src/elf"
+	"git.akyoto.dev/cli/q/src/errors"
+	"git.akyoto.dev/cli/q/src/log"
 )
 
 // Build describes a compiler build.
diff --git a/cli/Build.go b/src/cli/Build.go
similarity index 87%
rename from cli/Build.go
rename to src/cli/Build.go
index 7c8eac5..47e76db 100644
--- a/cli/Build.go
+++ b/src/cli/Build.go
@@ -1,8 +1,8 @@
 package cli
 
 import (
-	"git.akyoto.dev/cli/q/build"
-	"git.akyoto.dev/cli/q/log"
+	"git.akyoto.dev/cli/q/src/build"
+	"git.akyoto.dev/cli/q/src/log"
 )
 
 // Build builds an executable.
diff --git a/cli/Help.go b/src/cli/Help.go
similarity index 89%
rename from cli/Help.go
rename to src/cli/Help.go
index e34dc6c..35fa8cd 100644
--- a/cli/Help.go
+++ b/src/cli/Help.go
@@ -1,7 +1,7 @@
 package cli
 
 import (
-	"git.akyoto.dev/cli/q/log"
+	"git.akyoto.dev/cli/q/src/log"
 )
 
 // Help shows the command line argument usage.
diff --git a/cli/Main.go b/src/cli/Main.go
similarity index 100%
rename from cli/Main.go
rename to src/cli/Main.go
diff --git a/cli/System.go b/src/cli/System.go
similarity index 95%
rename from cli/System.go
rename to src/cli/System.go
index 36fde71..d76f565 100644
--- a/cli/System.go
+++ b/src/cli/System.go
@@ -4,7 +4,7 @@ import (
 	"os"
 	"runtime"
 
-	"git.akyoto.dev/cli/q/log"
+	"git.akyoto.dev/cli/q/src/log"
 )
 
 // System shows system information.
diff --git a/cli/cli_test.go b/src/cli/cli_test.go
similarity index 93%
rename from cli/cli_test.go
rename to src/cli/cli_test.go
index 111df5d..eb51e18 100644
--- a/cli/cli_test.go
+++ b/src/cli/cli_test.go
@@ -5,8 +5,8 @@ import (
 	"os"
 	"testing"
 
-	"git.akyoto.dev/cli/q/cli"
-	"git.akyoto.dev/cli/q/log"
+	"git.akyoto.dev/cli/q/src/cli"
+	"git.akyoto.dev/cli/q/src/log"
 	"git.akyoto.dev/go/assert"
 )
 
diff --git a/directory/Walk.go b/src/directory/Walk.go
similarity index 100%
rename from directory/Walk.go
rename to src/directory/Walk.go
diff --git a/elf/ELF64.go b/src/elf/ELF.go
similarity index 100%
rename from elf/ELF64.go
rename to src/elf/ELF.go
diff --git a/elf/Header.go b/src/elf/Header.go
similarity index 100%
rename from elf/Header.go
rename to src/elf/Header.go
diff --git a/elf/ProgramHeader.go b/src/elf/ProgramHeader.go
similarity index 100%
rename from elf/ProgramHeader.go
rename to src/elf/ProgramHeader.go
diff --git a/elf/SectionHeader.go b/src/elf/SectionHeader.go
similarity index 100%
rename from elf/SectionHeader.go
rename to src/elf/SectionHeader.go
diff --git a/elf/elf.md b/src/elf/elf.md
similarity index 100%
rename from elf/elf.md
rename to src/elf/elf.md
diff --git a/errors/InvalidPath.go b/src/errors/InvalidPath.go
similarity index 100%
rename from errors/InvalidPath.go
rename to src/errors/InvalidPath.go
diff --git a/log/log.go b/src/log/log.go
similarity index 100%
rename from log/log.go
rename to src/log/log.go