func Left(n uint) ANSI {
	if n == 0 {
		return empty
	}
	return newAnsi(fmt.Sprintf(esc+"%dD", n))
}
Left moves left the cursor.
package aec
import "fmt"
type EraseMode uint
var (
	EraseModes struct {
		All EraseMode
		Head EraseMode
		Tail EraseMode
	}
	Save ANSI
	Restore ANSI
	Hide ANSI
	Show ANSI
	Report ANSI
)
func Up(n uint) ANSI {
	if n == 0 {
		return empty
	}
	return newAnsi(fmt.Sprintf(esc+"%dA", n))
}
func Down(n uint) ANSI {
	if n == 0 {
		return empty
	}
	return newAnsi(fmt.Sprintf(esc+"%dB", n))
}
func Right(n uint) ANSI {
	if n == 0 {
		return empty
	}
	return newAnsi(fmt.Sprintf(esc+"%dC", n))
}