/setblock ~ ~ ~ minecraft:beacon 0 replace {Primary:30} 

---- Minecraft Crash Report ----
// I blame Dinnerbone.:)
//livid
Time: 23/02/15 16:42
Description: Ticking screen

java.lang.NullPointerException: Ticking screen
	at ayo$c.<init>(SourceFile:234)
	at ayo.e(SourceFile:98)
	at avf.s(SourceFile:1512)
	at avf.av(SourceFile:888)
	at avf.a(SourceFile:325)
	at net.minecraft.client.main.Main.main(SourceFile:124)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at ayo$c.<init>(SourceFile:234)
	at ayo.e(SourceFile:98)

-- Affected screen --
Details:
	Screen name: ayo

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bex['OscarLouisAnna'/60, l='MpServer', x=348.46, y=111.24, z=-257.48]]
	Chunk stats: MultiplayerChunkCache: 35, 35
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: 231.00,4.00,-200.00 - World: (231,4,-200), Chunk: (at 7,0,8 in 14,-13; contains blocks 224,0,-208 to 239,255,-193), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 128692 game time, 128692 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 1 total; [bex['OscarLouisAnna'/60, l='MpServer', x=348.46, y=111.24, z=-257.48]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bdc.a(SourceFile:309)
	at avf.b(SourceFile:2296)
	at avf.a(SourceFile:334)
	at net.minecraft.client.main.Main.main(SourceFile:124)

-- System Details --
Details:
	Minecraft Version: 1.8.3
	Operating System: Windows 8.1 (amd64) version 6.3
	CPU: 4x Intel(R) Core(TM) i3-2328M CPU @ 2.20GHz
	Java Version: 1.8.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 170376848 bytes (162 MB) / 395554816 bytes (377 MB) up to 1060372480 bytes (1011 MB)
	JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.8.3
	LWJGL: 2.9.4
	OpenGL: Intel(R) HD Graphics 3000 GL version 3.1.0 - Build 9.17.10.3347, Intel
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

	Using VBOs: No
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (UK)
	Profiler Position: N/A (disabled)