diff --git a/aes/colors.go b/aes/colors.go
new file mode 100644
index 0000000..8577f40
--- /dev/null
+++ b/aes/colors.go
@@ -0,0 +1,57 @@
+package aes
+
+import "strings"
+import "strconv"
+//import "fmt"
+
+type Effect int
+type Effects []Effect
+func (effects Effects) Format() string {
+	intStrs := make([]string, len(effects))
+	for i, e := range effects {
+		intStrs[i] = strconv.Itoa(int(e))
+	}
+	return strings.Join(intStrs, ";")
+}
+
+const (
+	EffectReset Effect = iota
+	EffectBold
+	EffectDim
+	EffectItalic
+	EffectUnderline
+	EffectBlinking
+)
+
+const (
+	EffectInverse Effect = 7 + iota
+	EffectHidden
+	// Effect strikethrough.
+	EffectStirke
+)
+
+const (
+	EffectBlackFG = 30 + iota
+	EffectRedFG
+	EffectGreenFG
+	EffectYellowFG
+	EffectBlueFG
+	EffectMagentaFG
+	EffectCyanFG
+	EffectWhiteFG
+	EffectDefaultFG
+)
+
+const (
+	EffectBlackBG Effect = 40 + iota
+	EffectRedBG
+	EffectGreenBG
+	EffectYellowBG
+	EffectBlueBG
+	EffectMagentaBG
+	EffectCyanBG
+	EffectWhiteBG
+	EffectDefaultBG
+)
+
+
diff --git a/aes/es.go b/aes/es.go
new file mode 100644
index 0000000..20838a2
--- /dev/null
+++ b/aes/es.go
@@ -0,0 +1,27 @@
+package aes
+
+const (
+	// Start.
+	ESC = "\x1B"
+
+	// Control sequence introducer.
+	CSI = ESC+"["
+
+	// Device control string.
+	DCS = ESC+"P"
+
+	// Operating system command.
+	OSC = ESC+"]"
+)
+
+const (
+	BEL = "\a"
+	BS = "\b"
+	HT = "\t"
+	LF = "\n"
+	VT = "\v"
+	FF = "\f"
+	CR = "\r"
+	DEL = "\x7F"
+)
+
diff --git a/aes/shortcut.go b/aes/shortcut.go
new file mode 100644
index 0000000..683589d
--- /dev/null
+++ b/aes/shortcut.go
@@ -0,0 +1,30 @@
+package aes
+
+import "fmt"
+
+type EffectText struct {
+	Effects Effects
+	Text string
+}
+
+func (et EffectText) String() string {
+	return fmt.Sprintf(
+		CSI+"%sm%s"+CSI+"0m",
+		et.Effects.Format(), et.Text,
+	)
+}
+func ETF(format string, v ...any) EffectText {
+	ret := EffectText{}
+	ret.Text = fmt.Sprintf(format, v...)
+	return ret
+}
+
+func (et EffectText) With(effects ...Effect) EffectText {
+	et.Effects = append(et.Effects, effects...)
+	return et
+}
+
+func (et EffectText) Bold() EffectText {
+	return et.With(EffectBold)
+}
+
diff --git a/cmd/termsize/main.go b/cmd/termsize/main.go
index aac0c90..2a480eb 100644
--- a/cmd/termsize/main.go
+++ b/cmd/termsize/main.go
@@ -4,6 +4,7 @@ import "surdeus.su/core/cli/tx"
 import "log"
 import "os"
 import "io"
+import "surdeus.su/core/cli/aes"
 //import "fmt"
 
 func main() {
@@ -32,7 +33,9 @@ func main() {
 		if key == tx.KeyControlC {
 			break
 		}
-		term.Printf("shit: %q\r\n", key)
+		term.Print(
+			"shit:", aes.ETF("%q", key).Bold().With(aes.EffectRedFG), "\r\n",
+		)
 	}
 }