diff --git a/canvae/PNG.hpp b/canvae/PNG.hpp
index 61179b8..468937a 100644
--- a/canvae/PNG.hpp
+++ b/canvae/PNG.hpp
@@ -72,16 +72,16 @@ public:
 				}
 			}
 
-			if(n > 100) {
-				const double average = cumulative / (double)n;
-				power[i] = -2.5/log(average/(double)max_int[i]);
-				if(power[i] < 0)
-					power[i] = 1;
-			} else {
+
+			const double average = cumulative / (double)(width*height);
+			power[i] = -2.5/log(average/(double)max_int[i]);
+			if(power[i] < 0) {
 				power[i] = 1;
+				LogInfo("negative power\n");
 			}
 
-			if(n <= width) {
+
+			if(n < width) {
 				LogInfo("not enough data\n");
 				return;
 			}
diff --git a/main.cpp b/main.cpp
index e21adc6..44bf13c 100644
--- a/main.cpp
+++ b/main.cpp
@@ -101,7 +101,7 @@ int main(int argc, char* argv[]) {
 			myAttractor.iterate();
 			myAttractor.plot();
 		}
-		if (j%16 == 0) sleep(1);
+		//if (j%16 == 0) sleep(1);
 		if(verbose >= 0) {
 			std::cout << "\r" << j << " out of " << iterations << " done." << std::flush;
 		}