fix lint
diff --git a/example/FluidMotion/dart/FluidMotion.dart b/example/FluidMotion/dart/FluidMotion.dart
index d01e765..d638035 100644
--- a/example/FluidMotion/dart/FluidMotion.dart
+++ b/example/FluidMotion/dart/FluidMotion.dart
@@ -354,14 +354,14 @@
for (var i = 1; i <= width; i++) {
var x = i - Wdt0 * u[++pos];
var y = j - Hdt0 * v[pos];
- if (x < 0.5)
+ if (x < 0.5) {
x = 0.5;
- else if (x > Wp5) x = Wp5;
+ } else if (x > Wp5) x = Wp5;
var i0 = x.toInt();
var i1 = i0 + 1;
- if (y < 0.5)
+ if (y < 0.5) {
y = 0.5;
- else if (y > Hp5) y = Hp5;
+ } else if (y > Hp5) y = Hp5;
var j0 = y.toInt();
var j1 = j0 + 1;
var s1 = x - i0;