diff --git a/_examples/merge/main.go b/_examples/merge/main.go
new file mode 100644
index 0000000..ca1e49f
--- /dev/null
+++ b/_examples/merge/main.go
@@ -0,0 +1,94 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"sync"
+	"time"
+
+	"github.com/vbauerster/mpb/v4"
+	"github.com/vbauerster/mpb/v4/decor"
+)
+
+func init() {
+	rand.Seed(time.Now().UnixNano())
+}
+
+func main() {
+	var wg sync.WaitGroup
+	// pass &wg (optional), so p will wait for it eventually
+	p := mpb.New(mpb.WithWaitGroup(&wg))
+	total, numBars := 100, 3
+	wg.Add(numBars)
+
+	for i := 0; i < numBars; i++ {
+		name := fmt.Sprintf("Bar#%d:", i)
+		var pdecorators mpb.BarOption
+		if i == 0 {
+			pdecorators = mpb.PrependDecorators(decor.Name(name),
+				// Merge to sync width with CountersNoUnit and Percentage decorators
+				decor.Merge(
+					decor.OnComplete(variadicName(decor.WCSyncSpace), "done"),
+					decor.WCSyncSpace, // Placeholder
+				),
+			)
+		} else {
+			pdecorators = mpb.PrependDecorators(decor.Name(name),
+				decor.CountersNoUnit("% .1d / % .1d", decor.WCSyncSpace),
+				decor.Percentage(decor.WCSyncSpace),
+			)
+		}
+		bar := p.AddBar(int64(total),
+			pdecorators,
+			mpb.AppendDecorators(
+				decor.OnComplete(
+					// ETA decorator with ewma age of 60
+					decor.EwmaETA(decor.ET_STYLE_GO, 60), "done",
+				),
+			),
+		)
+		// simulating some work
+		go func() {
+			defer wg.Done()
+			max := 100 * time.Millisecond
+			for i := 0; i < total; i++ {
+				start := time.Now()
+				time.Sleep(time.Duration(rand.Intn(10)+1) * max / 10)
+				// ewma based decorators require work duration measurement
+				bar.IncrBy(1, time.Since(start))
+			}
+		}()
+	}
+	// Waiting for passed &wg and for all bars to complete and flush
+	p.Wait()
+}
+
+func variadicName(wc decor.WC) decor.Decorator {
+	wc.Init()
+	d := &varName{
+		WC: wc,
+	}
+	return d
+}
+
+type varName struct {
+	decor.WC
+	complete *string
+}
+
+func (d *varName) Decor(st *decor.Statistics) string {
+	if st.Completed && d.complete != nil {
+		return d.FormatMsg(*d.complete)
+	}
+	if st.Current < 30 {
+		return d.FormatMsg("low low low")
+	} else if st.Current < 70 {
+		return d.FormatMsg("medium medium medium")
+	} else {
+		return d.FormatMsg("high high high high high high")
+	}
+}
+
+func (d *varName) OnCompleteMessage(msg string) {
+	d.complete = &msg
+}