diff --git a/global.go b/global.go
new file mode 100644
index 0000000..8394e21
--- /dev/null
+++ b/global.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"context"
+	"io"
+
+	"github.com/hymkor/gmnlisp"
+)
+
+type Global struct {
+	w      *Watcher
+	term   *Term
+	closer []func()
+}
+
+func (g *Global) Close() {
+	for i := len(g.closer) - 1; i >= 0; i-- {
+		g.closer[i]()
+	}
+	g.closer = nil
+}
+
+func (g *Global) sendln(ctx context.Context, w *gmnlisp.World, arg gmnlisp.Node) (gmnlisp.Node, error) {
+	io.WriteString(g.term, arg.String())
+	g.term.Write([]byte{'\r'})
+	return gmnlisp.Null, nil
+}
+
+func (g *Global) spawn(ctx context.Context, w *gmnlisp.World, args []gmnlisp.Node) (gmnlisp.Node, error) {
+
+	argStrings := make([]string, 0, len(args))
+	for _, s := range args {
+		argStrings = append(argStrings, s.String())
+	}
+
+	sh := g.term.Command(argStrings[0], argStrings[1:]...)
+	if err := sh.Start(); err != nil {
+		return nil, err
+	}
+	g.closer = append(g.closer, func() { sh.Wait() })
+	return gmnlisp.Null, nil
+}
+
+func (g *Global) expect(ctx context.Context, w *gmnlisp.World, args []gmnlisp.Node) (gmnlisp.Node, error) {
+	patterns := make([]string, 0, len(args))
+	for _, arg := range args {
+		patterns = append(patterns, arg.String())
+	}
+	result := g.w.Expect(patterns...)
+	return gmnlisp.Integer(result), nil
+}
diff --git a/main.go b/main.go
index a79e3ff..9619d96 100644
--- a/main.go
+++ b/main.go
@@ -4,55 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io"
 	"os"
 
 	"github.com/hymkor/gmnlisp"
 )
 
-type Global struct {
-	w      *Watcher
-	term   *Term
-	closer []func()
-}
-
-func (g *Global) Close() {
-	for i := len(g.closer) - 1; i >= 0; i-- {
-		g.closer[i]()
-	}
-	g.closer = nil
-}
-
-func (g *Global) sendln(ctx context.Context, w *gmnlisp.World, arg gmnlisp.Node) (gmnlisp.Node, error) {
-	io.WriteString(g.term, arg.String())
-	g.term.Write([]byte{'\r'})
-	return gmnlisp.Null, nil
-}
-
-func (g *Global) spawn(ctx context.Context, w *gmnlisp.World, args []gmnlisp.Node) (gmnlisp.Node, error) {
-
-	argStrings := make([]string, 0, len(args))
-	for _, s := range args {
-		argStrings = append(argStrings, s.String())
-	}
-
-	sh := g.term.Command(argStrings[0], argStrings[1:]...)
-	if err := sh.Start(); err != nil {
-		return nil, err
-	}
-	g.closer = append(g.closer, func() { sh.Wait() })
-	return gmnlisp.Null, nil
-}
-
-func (g *Global) expect(ctx context.Context, w *gmnlisp.World, args []gmnlisp.Node) (gmnlisp.Node, error) {
-	patterns := make([]string, 0, len(args))
-	for _, arg := range args {
-		patterns = append(patterns, arg.String())
-	}
-	result := g.w.Expect(patterns...)
-	return gmnlisp.Integer(result), nil
-}
-
 func mains(args []string) error {
 	term, err := NewTerm()
 	if err != nil {