fix: use math.Ceil to stabilise the timer display

main.go

@@ -21,6 +21,7 @@ package main
 import (
 	"flag"
 	"fmt"
+	"math"
 	"os"
 	"os/exec"
 	"os/signal"
@@ -163,8 +164,6 @@ func (p *Pominal) Start(label string, workCycleCount int) {
 	}
 
 	p.finish = time.Now().Add(d)
-
-	printScreen(p.TimeRemaining(), p.session, workCycleCount, p.maxWorkCycles, p.label)
 }
 
 // IncrementCount increments the pominal session count
@@ -174,17 +173,18 @@ func (p *Pominal) IncrementCount() {
 
 // TimeRemaining returns the remaining time left
 // on the timer
-func (p *Pominal) TimeRemaining() time.Duration {
+func (p *Pominal) TimeRemaining() float64 {
-	return p.finish.Sub(time.Now())
+	return p.finish.Sub(time.Now()).Seconds()
 }
 
 // printScreen prints the details of the Pominal session on screen including
 // the current work cycle number, the timer's current label and the time remaining
 // on the timer.
-func printScreen(remaining time.Duration, pominalCount, workCycle, maxWorkCycle int, label string) {
+func printScreen(remaining float64, pominalCount, workCycle, maxWorkCycle int, label string) {
 	clearScreen()
+	remainingSecs := int(math.Ceil(remaining))
 	fmt.Printf("Pominal session: %d\nWork cycle: %d of %d\n\n", pominalCount, workCycle, maxWorkCycle)
-	fmt.Printf("Timer: %s\nTime remaining: %02d:%02d", label, int(remaining.Minutes()), int(remaining.Seconds())%60)
+	fmt.Printf("Timer: %s\nTime remaining: %02d:%02d", label, (remainingSecs/60)%60, remainingSecs%60)
 }
 
 // clearScreen clears the terminal screen