timeline tiles off by one, also handle last tile width

icf.js

@@ -1,5 +1,5 @@
 let hashes = []
-let movie, position, frames, timelineTiles
+let movie, position, frames, timelineTiles, lastTimelineWidth
 
 let timelineElement = document.getElementById('timeline')
 let timelineElements = []
@@ -110,6 +110,7 @@ function loadTimeline(callback) {
         position = Math.floor(time % mspd / mspd * movie.duration * fps) / fps
         frames = Math.floor(movie.duration * fps)
         timelineTiles = Math.ceil(frames / timelineWidth)
+        lastTimelineWidth = frames % timelineWidth
         renderTimeline()
         timelineLink.innerHTML = movie.title + ' (' + movie.year + ') '
             + movie.director.join(', ')
@@ -151,7 +152,9 @@ function renderTimeline() {
     while (timelines[0].left > 0) {
         timelines.unshift({
             index: mod(timelines[0].index - 1, timelineTiles),
-            left: timelines[0].left - timelineWidth
+            left: timelines[0].left - (
+                timelines[0].index == 0 ? lastTimelineWidth : timelineWidth
+            )
         })
     }
     while (last(timelines).left < windowWidth) {
@@ -174,7 +177,7 @@ function renderTimeline() {
             element = document.createElement('img')
             element.id = 'timeline' + timeline.index
             element.src = 'https://media.indiancine.ma/' + movie.id
-                + '/timelinekeyframes64p' + (timeline.index + 1) + '.jpg'
+                + '/timelinekeyframes64p' + timeline.index + '.jpg'
             element.style.left = timeline.left + 'px'
             timelineElement.appendChild(element)
         }